Langbahn Team – Weltmeisterschaft

Timeline of the far future

Several terms redirect here. For other uses, see List of numbers and List of years.

A dark gray and red sphere representing the Earth lies against a black background to the right of an orange circular object representing the Sun
Artist's concept of the Earth 5–7.5 billion years from now, when the Sun has become a red giant

While the future cannot be predicted with certainty, present understanding in various scientific fields allows for the prediction of some far-future events, if only in the broadest outline.[1][2][3][4] These fields include astrophysics, which studies how planets and stars form, interact and die; particle physics, which has revealed how matter behaves at the smallest scales; evolutionary biology, which studies how life evolves over time; plate tectonics, which shows how continents shift over millennia; and sociology, which examines how human societies and cultures evolve.

These timelines begin at the start of the 4th millennium in 3001 CE, and continue until the furthest and most remote reaches of future time. They include alternative future events that address unresolved scientific questions, such as whether humans will become extinct, whether the Earth survives when the Sun expands to become a red giant and whether proton decay will be the eventual end of all matter in the universe.

Lists

Keys

Astronomy and astrophysics Astronomy and astrophysics
Geology and planetary science Geology and planetary science
Biology Biology
Particle physics Particle physics
Mathematics Mathematics
Technology and culture Technology and culture

Earth, the Solar System and the universe

See also: Formation and evolution of the Solar System and List of future astronomical events

All projections of the future of Earth, the Solar System and the universe must account for the second law of thermodynamics, which states that entropy, or a loss of the energy available to do work, must rise over time.[5] Stars will eventually exhaust their supply of hydrogen fuel via fusion and burn out. The Sun will likely expand sufficiently to overwhelm most of the inner planets (Mercury, Venus, and possibly Earth), but not the giant planets, including Jupiter and Saturn. Afterwards, the Sun would be reduced to the size of a white dwarf, and the outer planets and their moons would continue orbiting this diminutive solar remnant. This future situation may be similar to the white dwarf star MOA-2010-BLG-477L and the Jupiter-sized exoplanet orbiting it.[6][7][8]

Long after the death of the solar system, physicists expect that matter itself will eventually disintegrate under the influence of radioactive decay, as even the most stable materials break apart into subatomic particles.[9] Current data suggests that the universe has a flat geometry (or very close to flat), and thus will not collapse in on itself after a finite time.[10] This infinite future could allow for the occurrence of even massively improbable events, such as the formation of Boltzmann brains.[11]

Years from now Event
Astronomy and astrophysics 1,000 Due to the lunar tides decelerating the Earth's rotation, the average length of a solar day will be 1⁄30 SI second longer than it is today. To compensate, either a leap second will have to be added to the end of a day multiple times during each month, or one or more consecutive leap seconds will have to be added at the end of some or all months.[12]
Astronomy and astrophysics 1,100 As Earth's poles precess, Gamma Cephei replaces Polaris as the northern pole star.[13]
Geology and planetary science 10,000 If a failure of the Wilkes Subglacial Basin "ice plug" in the next few centuries were to endanger the East Antarctic Ice Sheet, it would take up to this long to melt completely. Sea levels would rise 3 to 4 metres.[14] One of the potential long-term effects of global warming, this is separate from the shorter-term threat to the West Antarctic Ice Sheet.
Astronomy and astrophysics 10,000 – 1 million [note 1] The red supergiant stars Betelgeuse and Antares will likely have exploded as supernovae. For a few months, the explosions should be easily visible on Earth in daylight.[15][16][17][18][19]
Astronomy and astrophysics 11,700 As Earth's poles precess, Vega, the fifth-brightest star in the sky, becomes the northern pole star.[20] Although Earth cycles through many different naked eye northern pole stars, Vega is the brightest.
Astronomy and astrophysics 11,000–15,000 By this point, halfway through Earth's precessional cycle, Earth's axial tilt will be mirrored, causing summer and winter to occur on opposite sides of Earth's orbit. This means that the seasons in the Southern Hemisphere will be less extreme than they are today, as it will be facing away from the Sun at Earth's perihelion and towards the Sun at aphelion, while the seasons in the Northern Hemisphere, which experiences more pronounced seasonal variation due to a higher percentage of land, will be more extreme.[21]
Geology and planetary science 15,000 The oscillating tilt of Earth's poles will move the North African Monsoon far enough north to change the climate of the Sahara back into a tropical one such as it had 5,000–10,000 years ago.[22][23]
Geology and planetary science 17,000[note 1] The best-guess recurrence rate for a "civilization-threatening" supervolcanic eruption large enough to eject one teratonne (one trillion tonnes) of pyroclastic material.[24][25]
Geology and planetary science 25,000 Mars' northern polar ice cap could recede as Mars reaches a warming peak of the northern hemisphere during the c. 50,000-year perihelion precession aspect of its Milankovitch cycle.[26][27]
Astronomy and astrophysics 36,000 The small red dwarf Ross 248 will pass within 3.024 light-years of Earth, becoming the closest star to the Sun.[28] It will recede after about 8,000 years, making first Alpha Centauri (again) and then Gliese 445 the nearest stars[28] (see timeline).
Geology and planetary science 50,000 According to Berger and Loutre (2002), the current interglacial period will end,[29] sending the Earth back into a glacial period of the current ice age, regardless of the effects of anthropogenic global warming.

However, according to more recent studies in 2016, anthropogenic climate change, if left unchecked, may delay this otherwise expected glacial period by as much as an additional 50,000 years, potentially skipping it entirely.[30]

Niagara Falls will have eroded the remaining 32 km to Lake Erie, and will therefore cease to exist.[31]

The many glacial lakes of the Canadian Shield will have been erased by post-glacial rebound and erosion.[32]

Astronomy and astrophysics 50,000 Due to lunar tides decelerating the Earth's rotation, a day on Earth is expected to be one SI second longer than it is today. In order to compensate, either a leap second will have to be added to the end of every day, or the length of the day will have to be officially lengthened by one SI second.[12]
Astronomy and astrophysics 100,000 The proper motion of stars across the celestial sphere, which results from their movement through the Milky Way, renders many of the constellations unrecognizable.[33]
Astronomy and astrophysics 100,000[note 1] The red hypergiant star VY Canis Majoris will likely have exploded in a supernova.[34]
Biology 100,000 Native North American earthworms, such as Megascolecidae, will have naturally spread north through the United States Upper Midwest to the Canada–US border, recovering from the Laurentide Ice Sheet glaciation (38°N to 49°N), assuming a migration rate of 10 metres per year, and that a possible renewed glaciation by this time has not prevented this.[35] (However, humans have already introduced non-native invasive earthworms of North America on a much shorter timescale, causing a shock to the regional ecosystem.)
Astronomy and astrophysics 100,000 – 10 million[note 1] Cupid and Belinda, moons of Uranus, will likely have collided.[36]
Geology and planetary science > 100,000 As one of the long-term effects of global warming, 10% of anthropogenic carbon dioxide will still remain in a stabilized atmosphere.[37]
Geology and planetary science 250,000 Kamaʻehuakanaloa (formerly Lōʻihi), the youngest volcano in the Hawaiian–Emperor seamount chain, will rise above the surface of the ocean and become a new volcanic island.[38]
Astronomy and astrophysics c. 300,000[note 1] At some point in the next few hundred thousand years, the Wolf–Rayet star WR 104 may explode in a supernova. There is a small chance WR 104 is spinning fast enough to produce a gamma-ray burst (GRB), and an even smaller chance that such a GRB could pose a threat to life on Earth.[39][40]
Astronomy and astrophysics 500,000[note 1] Earth will likely have been hit by an asteroid of roughly 1 km in diameter, assuming that it is not averted.[41]
Geology and planetary science 500,000 The rugged terrain of Badlands National Park in South Dakota will have eroded completely.[42]
Geology and planetary science 1 million Meteor Crater, a large impact crater in Arizona considered the "freshest" of its kind, will have worn away.[43]
Astronomy and astrophysics 1 million[note 1] Desdemona and Cressida, moons of Uranus, will likely have collided.[44]
Astronomy and astrophysics 1.29 ± 0.04 million The star Gliese 710 will pass as close as 0.051 parsecs—0.1663 light-years (10,520 astronomical units)[45]—to the Sun before moving away. This will gravitationally perturb members of the Oort cloud, a halo of icy bodies orbiting at the edge of the Solar System, thereafter raising the likelihood of a cometary impact in the inner Solar System.[46]
Biology 2 million The estimated time for the full recovery of coral reef ecosystems from human-caused ocean acidification if such acidification goes unchecked; the recovery of marine ecosystems after the acidification event that occurred about 65 million years ago took a similar length of time.[47]
Geology and planetary science 2 million+ The Grand Canyon will erode further, deepening slightly, but principally widening into a broad valley surrounding the Colorado River.[48]
Astronomy and astrophysics 2.7 million The average orbital half-life of current centaurs, that are unstable because of gravitational interaction of the several outer planets.[49] See predictions for notable centaurs.
Astronomy and astrophysics 3 million Due to tidal deceleration gradually slowing Earth's rotation, a day on Earth is expected to be one minute longer than it is today.[12]
Geology and planetary science 10 million The Red Sea will flood the widening East African Rift valley, causing a new ocean basin to divide the continent of Africa[50] and the African Plate into the newly formed Nubian Plate and the Somali Plate.

The Indian Plate will advance into Tibet by 180 km (110 mi). Nepali territory, whose boundaries are defined by the Himalayan peaks and on the plains of India, will cease to exist.[51]

Biology 10 million The estimated time for full recovery of biodiversity after a potential Holocene extinction, if it were on the scale of the five previous major extinction events.[52]

Even without a mass extinction, by this time most current species will have disappeared through the background extinction rate, with many clades gradually evolving into new forms.[53][54]

Astronomy and astrophysics 50 million Maximum estimated time before the moon Phobos collides with Mars.[55]
Geology and planetary science 50 million According to Christopher Scotese, the movement of the San Andreas Fault will cause the Gulf of California to flood into the California Central Valley. This will form a new inland sea on the West Coast of North America, causing the current locations of Los Angeles, California, and San Francisco, California to merge.[56][failed verification] The Californian coast will begin to be subducted into the Aleutian Trench.[57]

Africa's collision with Eurasia will close the Mediterranean Basin and create a mountain range similar to the Himalayas.[58]

The Appalachian Mountains peaks will largely wear away,[59] weathering at 5.7 Bubnoff units, although topography will actually rise as regional valleys deepen at twice this rate.[60]

Geology and planetary science 50–60 million The Canadian Rockies will wear away to a plain, assuming a rate of 60 Bubnoff units.[61] The Southern Rockies in the United States are eroding at a somewhat slower rate.[62]
Geology and planetary science 50–400 million The estimated time for Earth to naturally replenish its fossil fuel reserves.[63]
Geology and planetary science 80 million The Big Island will have become the last of the current Hawaiian Islands to sink beneath the surface of the ocean, while a more recently formed chain of "new Hawaiian Islands" will then have emerged in their place.[64]
Astronomy and astrophysics 100 million[note 1] Earth will likely have been hit by an asteroid comparable in size to the one that triggered the K–Pg extinction 66 million years ago, assuming this is not averted.[65]
Geology and planetary science 100 million According to the Pangaea Proxima model created by Christopher R. Scotese, a new subduction zone will open in the Atlantic Ocean and the Americas will begin to converge back toward Africa.[56][failed verification]

Upper estimate for lifespan of the rings of Saturn in their current state.[66]

Astronomy and astrophysics 110 million The Sun's luminosity will have increased by 1%.[67]
Astronomy and astrophysics 180 million Due to the gradual slowing of Earth's rotation, a day on Earth will be one hour longer than it is today.[12]
Astronomy and astrophysics 240 million From its present position, the Solar System completes one full orbit of the Galactic Center.[68]
Geology and planetary science 250 million According to Christopher R. Scotese, due to the northward movement of the West Coast of North America, the coast of California will collide with Alaska.[56][failed verification]
Geology and planetary science 250–350 million All the continents on Earth may fuse into a supercontinent.[56][69] Four potential arrangements of this configuration have been dubbed Amasia, Novopangaea, Pangaea Proxima and Aurica. This will likely result in a glacial period, lowering sea levels and increasing oxygen levels, further lowering global temperatures.[70][71]
Biology > 250 million The supercontinent's formation, thanks to a combination of continentality increasing distance from the ocean, an increase in volcanic activity resulting in atmospheric CO2 at double current levels, increased interspecific competition, and a 2.5 percent increase in solar flux, is likely to trigger an extinction event comparable to the Great Dying 250 million years ago. Mammals in particular are unlikely to survive.[72][73]
Geology and planetary science 300 million Due to a shift in the equatorial Hadley cells to roughly 40° north and south, the amount of arid land will increase by 25%.[73]
Geology and planetary science 300–600 million The estimated time for Venus's mantle temperature to reach its maximum. Then, over a period of about 100 million years, major subduction occurs and the crust is recycled.[74]
Geology and planetary science 350 million According to the extroversion model first developed by Paul F. Hoffman, subduction ceases in the Pacific Ocean Basin.[69][75]
Geology and planetary science 400–500 million The supercontinent (Pangaea Proxima, Novopangaea, Amasia, or Aurica) will likely have rifted apart.[69] This will likely result in higher global temperatures, similar to the Cretaceous period.[71]
Astronomy and astrophysics 500 million[note 1] The estimated time until a gamma-ray burst, or massive, hyperenergetic supernova, occurs within 6,500 light-years of Earth; close enough for its rays to affect Earth's ozone layer and potentially trigger a mass extinction, assuming the hypothesis is correct that a previous such explosion triggered the Ordovician–Silurian extinction event. However, the supernova would have to be precisely oriented relative to Earth to have such effect.[76]
Astronomy and astrophysics 600 million Tidal acceleration moves the Moon far enough from Earth that total solar eclipses are no longer possible.[77]
Geology and planetary science 500–600 million The Sun's increasing luminosity begins to disrupt the carbonate–silicate cycle; higher luminosity increases weathering of surface rocks, which traps carbon dioxide in the ground as carbonate. As water evaporates from the Earth's surface, rocks harden, causing plate tectonics to slow and eventually stop once the oceans evaporate completely. With less volcanism to recycle carbon into the Earth's atmosphere, carbon dioxide levels begin to fall.[78] By this time, carbon dioxide levels will fall to the point at which C3 photosynthesis is no longer possible. All plants that use C3 photosynthesis (≈99 percent of present-day species) will die.[79] The extinction of C3 plant life is likely to be a long-term decline rather than a sharp drop. It is likely that plant groups will die one by one well before the critical carbon dioxide level is reached. The first plants to disappear will be C3 herbaceous plants, followed by deciduous forests, evergreen broad-leaf forests and finally evergreen conifers.[73]
Biology 500–800 million As Earth begins to warm and carbon dioxide levels fall, plants—and, by extension, animals—could survive longer by evolving other strategies such as requiring less carbon dioxide for photosynthetic processes, becoming carnivorous, adapting to desiccation, or associating with fungi. These adaptations are likely to appear near the beginning of the moist greenhouse.[73] The decrease in plant life will result in less oxygen in the atmosphere, allowing for more DNA-damaging ultraviolet radiation to reach the surface. The rising temperatures will increase chemical reactions in the atmosphere, further lowering oxygen levels. Plant and animal communities become increasingly sparse and isolated as the Earth becomes more barren. Flying animals would be better off because of their ability to travel large distances looking for cooler temperatures.[80] Many animals may be driven to the poles or possibly underground. These creatures would become active during the polar night and aestivate during the polar day due to the intense heat and radiation. Much of the land would become a barren desert, and plants and animals would primarily be found in the oceans.[80]
Geology and planetary science 500–800 million As pointed out by Peter Ward and Donald Brownlee in their book The Life and Death of Planet Earth, according to NASA Ames scientist Kevin Zahnle, this is the earliest time for plate tectonics to eventually stop, due to the gradual cooling of the Earth's core, which could potentially turn the Earth back into a waterworld. This would, in turn, likely cause the extinction of animal life on Earth.[80]
Biology 800–900 million Carbon dioxide levels will fall to the point at which C4 photosynthesis is no longer possible.[79] Without plant life to recycle oxygen in the atmosphere, free oxygen and the ozone layer will disappear from the atmosphere allowing for intense levels of deadly UV light to reach the surface. Animals in food chains that were dependent on live plants will disappear shortly afterward.[73] At most, animal life could survive about 3 to 100 million years after plant life dies out. Just like plants, the extinction of animals will likely coincide with the loss of plants. It will start with large animals, then smaller animals and flying creatures, then amphibians, followed by reptiles and, finally, invertebrates.[78] In the book The Life and Death of Planet Earth, authors Peter D. Ward and Donald Brownlee state that some animal life may be able to survive in the oceans. Eventually, however, all multicellular life will die out.[81] The first sea animals to go extinct will be large fish, followed by small fish and then, finally, invertebrates.[78] The last animals to go extinct will be animals that do not depend on living plants, such as termites, or those near hydrothermal vents, such as worms of the genus Riftia.[73] The only life left on the Earth after this will be single-celled organisms.
Geology and planetary science 1 billion[note 2] 27% of the ocean's mass will have been subducted into the mantle. If this were to continue uninterrupted, it would reach an equilibrium where 65% of present-day surface water would be subducted.[82]
Astronomy and astrophysics 1 billion By this point, the Sagittarius Dwarf Spheroidal Galaxy will have been completely consumed by the Milky Way.[83]
Geology and planetary science 1.1 billion The Sun's luminosity will have increased by 10%, causing Earth's surface temperatures to reach an average of around 320 K (47 °C; 116 °F). The atmosphere will become a "moist greenhouse", resulting in a runaway evaporation of the oceans.[78][84] This would cause plate tectonics to stop completely, if not already stopped before this time.[85] Pockets of water may still be present at the poles, allowing abodes for simple life.[86][87]
Biology 1.2 billion High estimate until all plant life dies out, assuming some form of photosynthesis is possible despite extremely low carbon dioxide levels. If this is possible, rising temperatures will make any animal life unsustainable from this point on.[88][89][90]
Biology 1.3 billion Eukaryotic life dies out on Earth due to carbon dioxide starvation. Only prokaryotes remain.[81]
Astronomy and astrophysics 1.5 billion Callisto is captured into the mean-motion resonance of the other Galilean moons of Jupiter, completing the 1:2:4:8 chain. (Currently only Io, Europa and Ganymede participate in the 1:2:4 resonance.)[91]
Astronomy and astrophysics 1.5–1.6 billion The Sun's rising luminosity causes its circumstellar habitable zone to move outwards; as carbon dioxide rises in Mars' atmosphere, its surface temperature rises to levels akin to Earth during the ice age.[81][92]
Astronomy and astrophysics 1.5–4.5 billion Tidal acceleration moves the Moon far enough from the Earth to the point where it can no longer stabilize Earth's axial tilt. As a consequence, Earth's true polar wander becomes chaotic and extreme, leading to dramatic shifts in the planet's climate due to the changing axial tilt.[93]
Biology 1.6 billion Lower estimate until all remaining life, which by now had been reduced to colonies of unicellular organisms in isolated microenvironments such as high-altitude lakes and caves, goes extinct.[78][81][94]
Astronomy and astrophysics < 2 billion The first close passage of the Andromeda Galaxy and the Milky Way.[95]
Geology and planetary science 2 billion High estimate until the Earth's oceans evaporate if the atmospheric pressure were to decrease via the nitrogen cycle.[96]
Astronomy and astrophysics 2.55 billion The Sun will have reached a maximum surface temperature of 5,820 K (5,550 °C; 10,020 °F). From then on, it will become gradually cooler while its luminosity will continue to increase.[84]
Geology and planetary science 2.8 billion Earth's surface temperature will reach around 420 K (147 °C; 296 °F), even at the poles.[78][94]
Biology 2.8 billion High estimate until all remaining Earth life goes extinct.[78][94]
Geology and planetary science 3–4 billion The Earth's core freezes if the inner core continues to grow in size, based on its current growth rate of 1 mm (0.039 in) in diameter per year.[97][98][99] Without its liquid outer core, Earth's magnetosphere shuts down,[100] and solar winds gradually deplete the atmosphere.[101]
Astronomy and astrophysics c. 3 billion[note 1] There is a roughly 1-in-100,000 chance that the Earth will be ejected into interstellar space by a stellar encounter before this point, and a 1-in-300-billion chance that it will be both ejected into space and captured by another star around this point. If this were to happen, any remaining life on Earth could potentially survive for far longer if it survived the interstellar journey.[102]
Astronomy and astrophysics 3.3 billion[note 1] There is a roughly 1% chance that Jupiter's gravity may make Mercury's orbit so eccentric as to cross Venus's orbit by this time, sending the inner Solar System into chaos. Other possible scenarios include Mercury colliding with the Sun, being ejected from the Solar System, or colliding with Venus or Earth.[103][104]
Geology and planetary science 3.5–4.5 billion The Sun's luminosity will have increased by 35–40%, causing all water currently present in lakes and oceans to evaporate, if it had not done so earlier. The greenhouse effect caused by the massive, water-rich atmosphere will result in Earth's surface temperature rising to 1,400 K (1,130 °C; 2,060 °F)—hot enough to melt some surface rock.[85][96][105][106]
Astronomy and astrophysics 3.6 billion Neptune's moon Triton falls through the planet's Roche limit, potentially disintegrating into a planetary ring system similar to Saturn's.[107]
Geology and planetary science 4.5 billion Mars reaches the same solar flux the Earth did when it first formed, 4.5 billion years ago from today.[92]
Astronomy and astrophysics < 5 billion The Andromeda Galaxy will have fully merged with the Milky Way, forming an elliptical galaxy dubbed "Milkomeda".[95] There is also a small chance of the Solar System being ejected.[95][108] The planets of the Solar System will almost certainly not be disturbed by these events.[109][110][111]
Astronomy and astrophysics 5.4 billion The Sun, having now exhausted its hydrogen supply, leaves the main sequence and begins evolving into a red giant.[112]
Geology and planetary science 6.5 billion Mars reaches the same solar radiation flux as Earth today, after which it will suffer a similar fate to the Earth as described above.[92]
Astronomy and astrophysics 6.6 billion The Sun may experience a helium flash, resulting in its core becoming as bright as the combined luminosity of all the stars in the Milky Way galaxy.[113]
Astronomy and astrophysics 7.5 billion Earth and Mars may become tidally locked with the expanding red giant Sun.[92]
Astronomy and astrophysics 7.59 billion The Earth and Moon are very likely destroyed by falling into the Sun, just before the Sun reaches the top of its red giant phase.[112][note 3] Before the final collision, the Moon possibly spirals below Earth's Roche limit, breaking into a ring of debris, most of which falls to the Earth's surface.[114]

During this era, Saturn's moon Titan may reach surface temperatures necessary to support life.[115]

Astronomy and astrophysics 7.9 billion The Sun reaches the top of the red-giant branch of the Hertzsprung–Russell diagram, achieving its maximum radius of 256 times the present-day value.[116] In the process, Mercury, Venus and Earth are likely destroyed.[112]
Astronomy and astrophysics 8 billion The Sun becomes a carbon–oxygen white dwarf with about 54.05% of its present mass.[112][117][118][119] At this point, if the Earth survives, temperatures on the surface of the planet, as well as the other planets in the Solar System, will begin dropping rapidly, due to the white dwarf Sun emitting much less energy than it does today.
Astronomy and astrophysics 22.3 billion The estimated time until the end of the universe in a Big Rip, assuming a model of dark energy with w = −1.5.[120][121] If the density of dark energy is less than −1, then the universe's expansion will continue to accelerate and the observable universe will grow ever sparser. Around 200 million years before the Big Rip, galaxy clusters like the Local Group or the Sculptor Group would be destroyed. 60 million years before the Big Rip, all galaxies will begin to lose stars around their edges and will completely disintegrate in another 40 million years. Three months before the Big Rip, star systems will become gravitationally unbound, and planets will fly off into the rapidly expanding universe. Thirty minutes before the Big Rip, planets, stars, asteroids and even extreme objects like neutron stars and black holes will evaporate into atoms. One hundred zeptoseconds (10−19 seconds) before the Big Rip, atoms would break apart. Ultimately, once the Rip reaches the Planck scale, cosmic strings would be disintegrated as well as the fabric of spacetime itself. The universe would enter into a "rip singularity" when all non-zero distances become infinitely large. Whereas a "crunch singularity" involves all matter being infinitely concentrated, in a "rip singularity", all matter is infinitely spread out.[122] However, observations of galaxy cluster speeds by the Chandra X-ray Observatory suggest that the true value of w is c. −0.991, meaning the Big Rip is unlikely to occur.[123]
Astronomy and astrophysics 50 billion If the Earth and Moon are not engulfed by the Sun, by this time they will become tidally locked, with each showing only one face to the other.[124][125] Thereafter, the tidal action of the white dwarf Sun will extract angular momentum from the system, causing the lunar orbit to decay and the Earth's spin to accelerate.[126]
Astronomy and astrophysics 65 billion The Moon may collide with the Earth or be torn apart to form an orbital ring due to the decay of its orbit, assuming the Earth and Moon have not already been destroyed.[127]
Astronomy and astrophysics 100 billion – 1012 (1 trillion) All the ≈47 galaxies[128] of the Local Group will coalesce into a single large galaxy—an expanded "Milkomeda"/"Milkdromeda"; the last galaxies of the Local Group coalescing will mark the effective completion of its evolution.[9]
Astronomy and astrophysics 100–150 billion The universe's expansion causes all galaxies beyond the former Local Group to disappear beyond the cosmic light horizon, removing them from the observable universe.[129][130]
Astronomy and astrophysics 150 billion The universe will have expanded by a factor of 6,000, and the cosmic microwave background will have cooled by the same factor to around 4.5×10−4 K. The temperature of the background will continue to cool in proportion to the expansion of the universe.[130]
Astronomy and astrophysics 325 billion The estimated time by which the expansion of the universe isolates all gravitationally bound structures within their own cosmological horizon. At this point, the universe has expanded by a factor of more than 100 million from today, and even individual exiled stars are isolated.[131]
Astronomy and astrophysics 800 billion The expected time when the net light emission from the combined "Milkomeda" galaxy begins to decline as the red dwarf stars pass through their blue dwarf stage of peak luminosity.[132]
Astronomy and astrophysics 1012 (1 trillion) A low estimate for the time until star formation ends in galaxies as galaxies are depleted of the gas clouds they need to form stars.[9]

The Universe's expansion, assuming a constant dark energy density, multiplies the wavelength of the cosmic microwave background by 1029, exceeding the scale of the cosmic light horizon and rendering its evidence of the Big Bang undetectable. However, it may still be possible to determine the expansion of the universe through the study of hypervelocity stars.[129]

Astronomy and astrophysics 1.05×1012 (1.05 trillion) The estimated time by which the universe will have expanded by a factor of more than 1026, reducing the average particle density to less than one particle per cosmological horizon volume. Beyond this point, particles of unbound intergalactic matter are effectively isolated, and collisions between them cease to affect the future evolution of the universe.[131]
Astronomy and astrophysics 1.4×1012 (1.4 trillion) The estimated time by which the cosmic background radiation cools to a floor temperature of 10−30 K and does not decline further. This residual temperature comes from horizon radiation, which does not decline over time.[130]
Astronomy and astrophysics 2×1012 (2 trillion) The estimated time by which all objects beyond our former Local Group are redshifted by a factor of more than 1053. Even gamma rays that they emit are stretched so that their wavelengths are greater than the physical diameter of the horizon. The resolution time for such radiation will exceed the physical age of the universe.[133]
Astronomy and astrophysics 4×1012 (4 trillion) The estimated time until the red dwarf star Proxima Centauri, the closest star to the Sun today, at a distance of 4.25 light-years, leaves the main sequence and becomes a white dwarf.[134]
Astronomy and astrophysics 1013 (10 trillion) The estimated time of peak habitability in the universe, unless habitability around low-mass stars is suppressed.[135]
Astronomy and astrophysics 1.2×1013 (12 trillion) The estimated time until the red dwarf VB 10, as of 2016 the least-massive main-sequence star with an estimated mass of 0.075 M☉, runs out of hydrogen in its core and becomes a white dwarf.[136][137]
Astronomy and astrophysics 3×1013 (30 trillion) The estimated time for stars (including the Sun) to undergo a close encounter with another star in local stellar neighborhoods. Whenever two stars (or stellar remnants) pass close to each other, their planets' orbits can be disrupted, potentially ejecting them from the system entirely. On average, the closer a planet's orbit to its parent star the longer it takes to be ejected in this manner, because it is gravitationally more tightly bound to the star.[138]
Astronomy and astrophysics 1014 (100 trillion) A high estimate for the time by which normal star formation ends in galaxies.[9] This marks the transition from the Stelliferous Era to the Degenerate Era; with too little free hydrogen to form new stars, all remaining stars slowly exhaust their fuel and die.[139] By this time, the universe will have expanded by a factor of approximately 102554.[131]
Astronomy and astrophysics 1.1–1.2×1014 (110–120 trillion) The time by which all stars in the universe will have exhausted their fuel (the longest-lived stars, low-mass red dwarfs, have lifespans of roughly 10–20 trillion years).[9] After this point, the stellar-mass objects remaining are stellar remnants (white dwarfs, neutron stars, black holes) and brown dwarfs.

Collisions between brown dwarfs will create new red dwarfs on a marginal level: on average, about 100 stars will be shining in what was once "Milkomeda". Collisions between stellar remnants will create occasional supernovae.[9]

Astronomy and astrophysics 1015 (1 quadrillion) The estimated time until stellar close encounters detach all planets in star systems (including the Solar System) from their orbits.[9]

By this point, the black dwarf that was once the Sun will have cooled to 5 K (−268.15 °C; −450.67 °F).[140]

Astronomy and astrophysics 1019 to 1020
(10–100 quintillion) 		The estimated time until 90–99% of brown dwarfs and stellar remnants (including the Sun) are ejected from galaxies. When two objects pass close enough to each other, they exchange orbital energy, with lower-mass objects tending to gain energy. Through repeated encounters, the lower-mass objects can gain enough energy in this manner to be ejected from their galaxy. This process eventually causes "Milkomeda"/"Milkdromeda" to eject the majority of its brown dwarfs and stellar remnants.[9][141]
Astronomy and astrophysics 1020 (100 quintillion) The estimated time until the Earth collides with the black dwarf Sun due to the decay of its orbit via emission of gravitational radiation,[142] if the Earth is not ejected from its orbit by a stellar encounter or engulfed by the Sun during its red giant phase.[142]
Astronomy and astrophysics 1023 (100 sextillion) Around this timescale most stellar remnants and other objects are ejected from the remains of their galactic cluster.[143]
Astronomy and astrophysics 1030 (1 nonillion) The estimated time until most or all of the remaining 1–10% of stellar remnants not ejected from galaxies fall into their galaxies' central supermassive black holes. By this point, with binary stars having fallen into each other, and planets into their stars, via emission of gravitational radiation, only solitary objects (stellar remnants, brown dwarfs, ejected planetary-mass objects, black holes) will remain in the universe.[9]
Particle physics 2×1036 (2 undecillion) The estimated time for all nucleons in the observable universe to decay, if the hypothesized proton half-life takes its smallest possible value (8.2 × 1033 years).[144][note 4]
Particle physics 1036–1038 (1–100 undecillion) Estimated time for all remaining planets and stellar-mass objects, including the Sun, to disintegrate if proton decay can occur.[9]
Particle physics 3×1043 (30 tredecillion) Estimated time for all nucleons in the observable universe to decay, if the hypothesized proton half-life takes the largest possible value, 1041 years,[9] assuming that the Big Bang was inflationary and that the same process that made baryons predominate over anti-baryons in the early universe makes protons decay. By this time, if protons do decay, the Black Hole Era, in which black holes are the only remaining celestial objects, begins.[9][139]
Particle physics 3.14×1050 (314 quindecillion) The estimated time until a micro black hole of 1 Earth mass today, decays into subatomic particles by the emission of Hawking radiation.[145]
Particle physics 1065 (100 vigintillion) Assuming that protons do not decay, estimated time for rigid objects, from free-floating rocks in space to planets, to rearrange their atoms and molecules via quantum tunneling. On this timescale, any discrete body of matter "behaves like a liquid" and becomes a smooth sphere due to diffusion and gravity.[142]
Particle physics 1.16×1067 (11.6 unvigintillion) The estimated time until a black hole of 1 solar mass today, decays by Hawking radiation.[145]
Particle physics 1.54×1091–1.41×1092 (15.4–141 novemvigintillion) The estimated time until the resulting supermassive black hole of "Milkomeda"/"Milkdromeda" from the merger of Sagittarius A* and the P2 concentration during the collision of the Milky Way and Andromeda galaxies[146] vanishes by Hawking radiation,[145] assuming it does not accrete any additional matter nor merge with other black holes—though it is most likely that this supermassive black hole will nonetheless merge with other supermassive black holes during the gravitational collapse towards "Milkomeda"/"Milkdromeda" of other Local Group galaxies.[147] This supermassive black hole might be the very last entity from the former Local Group to disappear—and the last evidence of its existence.
Particle physics 10106 – 2.1×10109 The estimated time until ultramassive black holes of 1014 (100 trillion) solar masses, predicted to form during the gravitational collapse of galaxy superclusters,[148] decay by Hawking radiation.[145] This marks the end of the Black Hole Era. Beyond this time, if protons do decay, the universe enters the Dark Era, in which all physical objects have decayed to subatomic particles, gradually winding down to their final energy state in the heat death of the universe.[9][139]
Particle physics 10161 A 2018 estimate of Standard Model lifetime before collapse of a false vacuum; 95% confidence interval is 1065 to 101383 years due in part to uncertainty about the top quark's mass.[149][note 5]
Particle physics 10200 The highest estimate for the time it would take for all nucleons in the observable universe to decay, if they do not decay via the above process, but instead through any one of many different mechanisms allowed in modern particle physics (higher-order baryon non-conservation processes, virtual black holes, sphalerons, etc.) on time scales of 1046 to 10200 years.[139]
Astronomy and astrophysics 101100–32000 The estimated time for black dwarfs of 1.2 solar masses or more to undergo supernovae as a result of slow silicon–nickel–iron fusion, as the declining electron fraction lowers their Chandrasekhar limit, assuming protons do not decay.[150]
Astronomy and astrophysics 101500 Assuming protons do not decay, estimated time until all baryonic matter in stellar remnants, planets and planetary-mass objects has either fused together via muon-catalyzed fusion to form iron-56 or decayed from a higher mass element into iron-56 to form iron stars.[142]
Particle physics [note 6][note 7] A low estimate for the time until all iron stars collapse via quantum tunnelling into black holes, assuming no proton decay or virtual black holes, and that Planck-scale black holes can exist.[142]

On this vast timescale, even ultra-stable iron stars will have been destroyed by quantum-tunnelling events. At this lower end of the timescale, iron stars decay directly to black holes, as this decay mode is much more favourable than decaying into a neutron star (which has an expected timescale of years),[142] and later decaying into a black hole. The subsequent evaporation of each resulting black hole into subatomic particles (a process lasting roughly 10100 years), and subsequent shift to the Dark Era is on these timescales instantaneous.

Particle physics [note 1][note 7][note 8] The estimated time for a Boltzmann brain to appear in the vacuum via a spontaneous entropy decrease.[11]
Particle physics [note 7] Highest estimate for the time until all iron stars collapse via quantum tunnelling into neutron stars or black holes, assuming no proton decay or virtual black holes, and that black holes below the Chandrasekhar mass cannot form directly.[142] On these timescales, neutron stars above the Chandrasekhar mass rapidly collapse into black holes, and black holes formed by these processes instantly evaporate into subatomic particles.

This is also the highest estimated possible time for the Black Hole Era (and subsequent Dark Era) to commence. Beyond this point, it is almost certain that the universe will be an almost pure vacuum, with all baryonic matter having decayed into subatomic particles, gradually winding down their energy level until it reaches its final energy state, assuming it does not happen before this time.

Particle physics [note 7] The highest estimate for the time it takes for the universe to reach its final energy state.[11]
Particle physics [note 1][note 7] Around this vast timeframe, quantum tunnelling in any isolated patch of the universe could generate new inflationary events, resulting in new Big Bangs giving birth to new universes.[151]

(Because the total number of ways in which all the subatomic particles in the observable universe can be combined is ,[152][153] a number which, when multiplied by , is approximately , this is also the time required for a quantum-tunnelled and quantum fluctuation-generated Big Bang to produce a new universe identical to our own, assuming that every new universe contained at least the same number of subatomic particles and obeyed laws of physics within the landscape predicted by string theory.)[154][155]

Humanity and human constructs

To date five spacecraft (Voyager 1, Voyager 2, Pioneer 10, Pioneer 11 and New Horizons) are on trajectories which will take them out of the Solar System and into interstellar space. Barring an extremely unlikely collision with some object, the craft should persist indefinitely.[156]

Date or years from now Event
Astronomy and astrophysics 1,000 The SNAP-10A nuclear satellite, launched in 1965 to an orbit 700 km (430 mi) above Earth, will return to the surface.[157][158]
technology and culture 3183 CE The Zeitpyramide (time pyramid), a public art work started in 1993 at Wemding, Germany, is scheduled for completion.[159]
technology and culture 2,000 Maximum lifespan of the data films in Arctic World Archive, a repository which contains code of open-source projects on GitHub along with other data of historical interest, if stored in optimum conditions.[160]
Particle physics 10,000 The Waste Isolation Pilot Plant, for nuclear weapons waste, is planned to be protected until this time, with a "Permanent Marker" system designed to warn off visitors through both multiple languages (the six UN languages and Navajo) and through pictograms.[161] The Human Interference Task Force has provided the theoretical basis for United States plans for future nuclear semiotics.[162]
technology and culture 10,000 Planned lifespan of the Long Now Foundation's several ongoing projects, including a 10,000-year clock known as the Clock of the Long Now, the Rosetta Project and the Long Bet Project.[163]

Estimated lifespan of the HD-Rosetta analog disc, an ion beam-etched writing medium on nickel plate, a technology developed at Los Alamos National Laboratory and later commercialized. (The Rosetta Project uses this technology, named after the Rosetta Stone.)

Biology 10,000 Projected lifespan of Norway's Svalbard Global Seed Vault.[164]
technology and culture 10,000 Most probable estimated lifespan of technological civilization, according to Frank Drake's original formulation of the Drake equation.[165]
Biology 10,000 If globalization trends lead to panmixia, human genetic variation will no longer be regionalized, as the effective population size will equal the actual population size.[166]
technology and culture 20,000 According to the glottochronology linguistic model of Morris Swadesh, future languages should retain just 1 out of 100 "core vocabulary" words on their Swadesh list compared to that of their current progenitors.[167]

Chernobyl is expected to become habitable again.[168]

Particle physics 24,110 Half-life of plutonium-239.[169] At this point the Chernobyl Exclusion Zone, the 2,600-square-kilometre (1,000 sq mi) area of Ukraine and Belarus left deserted by the 1986 Chernobyl disaster, will return to normal levels of radiation.[170]
Astronomy and astrophysics 25,000 The Arecibo message, a collection of radio data transmitted on 16 November 1974, reaches the distance of its destination, the globular cluster Messier 13.[171] This is the only interstellar radio message sent to such a distant region of the galaxy. There will be a 24-light-year shift in the cluster's position in the galaxy during the time it takes the message to reach it, but as the cluster is 168 light-years in diameter, the message will still reach its destination.[172] Any reply will take at least another 25,000 years from the time of its transmission (assuming no faster-than-light communication).
technology and culture 14 September 30,828 CE Maximum system time for 64-bit NTFS-based Windows operating system.[173]
Astronomy and astrophysics 33,800 Pioneer 10 passes within 3.4 light-years of Ross 248.[174]
Astronomy and astrophysics 42,200 Voyager 2 passes within 1.7 light-years of Ross 248.[174]
Astronomy and astrophysics 44,100 Voyager 1 passes within 1.8 light-years of Gliese 445.[174]
Astronomy and astrophysics 46,600 Pioneer 11 passes within 1.9 light-years of Gliese 445.[174]
Geology and planetary science 50,000 Estimated atmospheric lifetime of tetrafluoromethane, the most durable greenhouse gas.[175]
Astronomy and astrophysics 90,300 Pioneer 10 passes within 0.76 light-years of HIP 117795.[174]
Geology and planetary science 100,000+ Time required to terraform Mars with an oxygen-rich breathable atmosphere, using only plants with solar efficiency comparable to the biosphere currently found on Earth.[176]
Technology and culture 100,000–1 million Estimated time by which humanity could colonize our Milky Way galaxy and become capable of harnessing all the energy of the galaxy, assuming a velocity of 10% the speed of light.[177]
Particle physics 250,000 The estimated minimum time at which the spent plutonium stored at New Mexico's Waste Isolation Pilot Plant will cease to be radiologically lethal to humans.[178]
technology and culture 13 September 275,760 CE Maximum system time for the JavaScript programming language.[179]
Astronomy and astrophysics 492,300 Voyager 1 passes within 1.3 light-years of HD 28343.[174]
technology and culture 1 million Estimated lifespan of Memory of Mankind (MOM) self storage-style repository in Hallstatt salt mine in Austria, which stores information on inscribed tablets of stoneware.[180]

Planned lifespan of the Human Document Project being developed at the University of Twente in the Netherlands.[181]

Geology and planetary science 1 million Current glass objects in the environment will be decomposed.[182]

Various public monuments composed of hard granite will have eroded one metre, in a moderate climate, assuming a rate of 1 Bubnoff unit (1 mm in 1,000 years, or ≈1 inch in 25,000 years).[183]

Without maintenance, the Great Pyramid of Giza will erode into unrecognizability.[184]

On the Moon, Neil Armstrong's "one small step" footprint at Tranquility Base will erode by this time, along with those left by all twelve Apollo moonwalkers, due to the accumulated effects of space weathering.[99][185] (Normal erosion processes active on Earth are not present due to the Moon's almost complete lack of atmosphere.)

Astronomy and astrophysics 1.2 million Pioneer 11 comes within 3 light-years of Delta Scuti.[174]
Astronomy and astrophysics 2 million Pioneer 10 passes near the bright star Aldebaran.[186]
Biology 2 million Vertebrate species separated for this long will generally undergo allopatric speciation.[187] Evolutionary biologist James W. Valentine predicted that if humanity has been dispersed among genetically isolated space colonies over this time, the galaxy will host an evolutionary radiation of multiple human species with a "diversity of form and adaptation that would astound us".[188] This would be a natural process of isolated populations, unrelated to potential deliberate genetic enhancement technologies.
Astronomy and astrophysics 4 million Pioneer 11 passes near one of the stars in the constellation Aquila.[186]
Mathematics 5 million The Y chromosome is expected to gradually degenerate and cease to exist.[189]
Geology and planetary science 7.2 million Without maintenance, Mount Rushmore will erode into unrecognizability.[190]
Mathematics 7.8 million Humanity has a 95% probability of being extinct by this date, according to J. Richard Gott's formulation of the controversial Doomsday argument.[191]
Astronomy and astrophysics 8 million Most probable lifespan of Pioneer 10 plaque, before the etching is destroyed by poorly understood interstellar erosion processes.[192]

The LAGEOS satellites' orbits will decay, and they will re-enter Earth's atmosphere, carrying with them a message to any far future descendants of humanity, and a map of the continents as they are expected to appear then.[193]

technology and culture 100 million Maximal estimated lifespan of technological civilization, according to Frank Drake's original formulation of the Drake equation.[194]
Geology and planetary science 100 million Future archaeologists should be able to identify an "Urban Stratum" of fossilized great coastal cities, mostly through the remains of underground infrastructure such as building foundations and utility tunnels.[195]
technology and culture 1 billion Estimated lifespan of "Nanoshuttle memory device" using an iron nanoparticle moved as a molecular switch through a carbon nanotube, a technology developed at the University of California at Berkeley.[196]
Astronomy and astrophysics 1 billion Estimated lifespan of the two Voyager Golden Records, before the information stored on them is rendered unrecoverable.[197]

Estimated time for an astroengineering project to alter the Earth's orbit, compensating for the Sun's rising brightness and outward migration of the habitable zone, accomplished by repeated asteroid gravity assists.[198][199]

technology and culture 292,277,026,596 CE
(292 billion) 		Numeric overflow in system time for 64-bit Unix systems.[200]
Astronomy and astrophysics 1020 (100 quintillion) Estimated timescale for the Pioneer and Voyager spacecraft to collide with a star (or stellar remnant).[174]
technology and culture 3×1019 – 3×1021
(30 quintillion–3 sextillion) 		Estimated lifespan of "Superman memory crystal" data storage using femtosecond laser-etched nanostructures in glass, a technology developed at the University of Southampton, at an ambient temperature of 30 °C (86 °F; 303 K).[201][202]

Graphical timelines

For graphical timelines, logarithmic timelines of these events, see:

See also

Notes

  1. ^ a b c d e f g h i j k l m This represents the time by which the event will most probably have happened. It may occur randomly at any time from the present.
  2. ^ Units are short scale.
  3. ^ This has been a tricky question for quite a while; see the 2001 paper by Rybicki, K. R. and Denis, C. However, according to the latest calculations, this happens with a very high degree of certainty.
  4. ^ Around 264 half-lives. Tyson et al. employ the computation with a different value for half-life.
  5. ^ Manuscript was updated after publication; lifetime numbers are taken from the latest revision at https://arxiv.org/abs/1707.08124.
  6. ^ is 1 followed by 1026 (100 septillion) zeroes.
  7. ^ a b c d e Although listed in years for convenience, the numbers at this point are so vast that their digits would remain unchanged regardless of which conventional units they were listed in, be they nanoseconds or star lifespans.
  8. ^ is 1 followed by 1050 (100 quindecillion) zeroes.

References

  1. ^ Overbye, Dennis (2 May 2023). "Who Will Have the Last Word on the Universe? – Modern science suggests that we and all our achievements and memories are destined to vanish like a dream. Is that sad or good?". The New York Times. Archived from the original on 2 May 2023. Retrieved 2 May 2023.
  2. ^ "Deep Time Reckoning". MIT Press. Retrieved 14 August 2022.
  3. ^ Rescher, Nicholas (1998). Predicting the future: An introduction to the theory of forecasting. State University of New York Press. ISBN 978-0791435533.
  4. ^ Adams, Fred C.; Laughlin, Gregory (1 April 1997). "A dying universe: the long-term fate and evolution of astrophysical objects" (PDF). Reviews of Modern Physics. 69 (2): 337–372. arXiv:astro-ph/9701131. Bibcode:1997RvMP...69..337A. doi:10.1103/RevModPhys.69.337. ISSN 0034-6861. S2CID 12173790. Archived from the original (PDF) on 27 July 2018. Retrieved 10 October 2021.
  5. ^ Nave, C.R. "Second Law of Thermodynamics". Georgia State University. Archived from the original on 13 May 2012. Retrieved 3 December 2011.
  6. ^ Blackman, J. W.; Beaulieu, J. P.; Bennett, D. P.; Danielski, C.; et al. (13 October 2021). "A Jovian analogue orbiting a white dwarf star". Nature. 598 (7880): 272–275. arXiv:2110.07934. Bibcode:2021Natur.598..272B. doi:10.1038/s41586-021-03869-6. PMID 34646001. S2CID 238860454. Retrieved 14 October 2021.
  7. ^ Blackman, Joshua; Bennett, David; Beaulieu, Jean-Philippe (13 October 2021). "A Crystal Ball Into Our Solar System's Future – Giant Gas Planet Orbiting a Dead Star Gives Glimpse Into the Predicted Aftermath of our Sun's Demise". Keck Observatory. Retrieved 14 October 2021.
  8. ^ Ferreira, Becky (13 October 2021). "Astronomers Found a Planet That Survived Its Star's Death – The Jupiter-size planet orbits a type of star called a white dwarf, and hints at what our solar system could be like when the Sun burns out". The New York Times. Archived from the original on 28 December 2021. Retrieved 14 October 2021.
  9. ^ a b c d e f g h i j k l m Adams, Fred C.; Laughlin, Gregory (1997). "A dying universe: the long-term fate and evolution of astrophysical objects". Reviews of Modern Physics. 69 (2): 337–372. arXiv:astro-ph/9701131. Bibcode:1997RvMP...69..337A. doi:10.1103/RevModPhys.69.337. S2CID 12173790.
  10. ^ Komatsu, E.; Smith, K. M.; Dunkley, J.; Bennett, C. L.; et al. (2011). "Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation". The Astrophysical Journal Supplement Series. 192 (2): 18. arXiv:1001.4731. Bibcode:2011ApJS..192...19W. doi:10.1088/0067-0049/192/2/18. S2CID 17581520.
  11. ^ a b c Linde, Andrei (2007). "Sinks in the landscape, Boltzmann brains and the cosmological constant problem". Journal of Cosmology and Astroparticle Physics. 2007 (1): 022. arXiv:hep-th/0611043. Bibcode:2007JCAP...01..022L. CiteSeerX 10.1.1.266.8334. doi:10.1088/1475-7516/2007/01/022. ISSN 1475-7516. S2CID 16984680.
  12. ^ a b c d Finkleman, David; Allen, Steve; Seago, John; Seaman, Rob; et al. (June 2011). "The Future of Time: UTC and the Leap Second". American Scientist. 99 (4): 312. arXiv:1106.3141. Bibcode:2011arXiv1106.3141F. doi:10.1511/2011.91.312. S2CID 118403321.
  13. ^ McClure, Bruce; Byrd, Deborah (22 September 2021). "Gamma Cephei, aka Errai, a future North Star". earthsky.org. Retrieved 25 December 2021.
  14. ^ Mengel, M.; Levermann, A. (4 May 2014). "Ice plug prevents irreversible discharge from East Antarctica". Nature Climate Change. 4 (6): 451–455. Bibcode:2014NatCC...4..451M. doi:10.1038/nclimate2226.
  15. ^ Hockey, T.; Trimble, V. (2010). "Public reaction to a V = −12.5 supernova". The Observatory. 130 (3): 167. Bibcode:2010Obs...130..167H.
  16. ^ "A giant star is acting strange, and astronomers are buzzing". National Geographic. 26 December 2019. Archived from the original on 8 January 2021. Retrieved 15 March 2020.
  17. ^ Sessions, Larry (29 July 2009). "Betelgeuse will explode someday". EarthSky Communications, Inc. Archived from the original on 23 May 2021. Retrieved 16 November 2010.
  18. ^ Saio, Hideyuki; Nandal, Devesh; Meynet, Georges; Ekstöm, Sylvia (2 June 2023). "The evolutionary stage of Betelgeuse inferred from its pulsation periods". Monthly Notices of the Royal Astronomical Society. 526 (2): 2765. arXiv:2306.00287. Bibcode:2023MNRAS.526.2765S. doi:10.1093/mnras/stad2949.
  19. ^ Neuhäuser, R.; Torres, G.; Mugrauer, M.; Neuhäuser, D. L.; et al. (July 2022). "Colour evolution of Betelgeuse and Antares over two millennia, derived from historical records, as a new constraint on mass and age". Monthly Notices of the Royal Astronomical Society. 516 (1): 693–719. arXiv:2207.04702. Bibcode:2022MNRAS.516..693N. doi:10.1093/mnras/stac1969.
  20. ^ Howell, Elizabeth (9 November 2018). "Vega: The North Star of the Past and the Future". Space.com. Retrieved 25 December 2021.
  21. ^ Plait, Phil (2002). Bad Astronomy: Misconceptions and Misuses Revealed, from Astrology to the Moon Landing "Hoax". John Wiley and Sons. pp. 55–56. ISBN 978-0-471-40976-2.
  22. ^ Mowat, Laura (14 July 2017). "Africa's desert to become lush green tropics as monsoons MOVE to Sahara, scientists say". Daily Express. Archived from the original on 8 March 2021. Retrieved 23 March 2018.
  23. ^ "Orbit: Earth's Extraordinary Journey". ExptU. 23 December 2015. Archived from the original on 14 July 2018. Retrieved 23 March 2018.
  24. ^ "'Super-eruption' timing gets an update – and not in humanity's favour". Nature. 552 (7683): 8. 30 November 2017. doi:10.1038/d41586-017-07777-6. PMID 32080527. S2CID 4461626. Archived from the original on 24 July 2021. Retrieved 28 August 2020.
  25. ^ "Scientists predict a volcanic eruption that would destroy humanity could happen sooner than previously thought". The Independent. Archived from the original on 9 November 2020. Retrieved 28 August 2020.
  26. ^ Schorghofer, Norbert (23 September 2008). "Temperature response of Mars to Milankovitch cycles". Geophysical Research Letters. 35 (18): L18201. Bibcode:2008GeoRL..3518201S. doi:10.1029/2008GL034954. S2CID 16598911.
  27. ^ Beech, Martin (2009). Terraforming: The Creating of Habitable Worlds. Springer. pp. 138–142. Bibcode:2009tchw.book.....B.
  28. ^ a b Matthews, R. A. J. (Spring 1994). "The Close Approach of Stars in the Solar Neighborhood". Quarterly Journal of the Royal Astronomical Society. 35 (1): 1. Bibcode:1994QJRAS..35....1M.
  29. ^ Berger, A.; Loutre, M. F. (23 August 2002). "An Exceptionally Long Interglacial Ahead?". Science. 297 (5585): 1287–1288. doi:10.1126/science.1076120. ISSN 0036-8075. PMID 12193773. S2CID 128923481.
  30. ^ "Human-made climate change suppresses the next ice age – Potsdam Institute for Climate Impact Research". pik-potsdam.de. Archived from the original on 7 January 2021. Retrieved 21 October 2020.
  31. ^ "Niagara Falls Geology Facts & Figures". Niagara Parks. Archived from the original on 19 July 2011. Retrieved 29 April 2011.
  32. ^ Bastedo, Jamie (1994). Shield Country: The Life and Times of the Oldest Piece of the Planet. Komatik Series, ISSN 0840-4488. Vol. 4. Arctic Institute of North America of the University of Calgary. p. 202. ISBN 9780919034792. Archived from the original on 3 November 2020. Retrieved 15 March 2020.
  33. ^ Tapping, Ken (2005). "The Unfixed Stars". National Research Council Canada. Archived from the original on 8 July 2011. Retrieved 29 December 2010.
  34. ^ Monnier, J. D.; Tuthill, P.; Lopez, GB; Cruzalebes, P.; et al. (1999). "The Last Gasps of VY Canis Majoris: Aperture Synthesis and Adaptive Optics Imagery". The Astrophysical Journal. 512 (1): 351–361. arXiv:astro-ph/9810024. Bibcode:1999ApJ...512..351M. doi:10.1086/306761. S2CID 16672180.
  35. ^ Schaetzl, Randall J.; Anderson, Sharon (2005). Soils: Genesis and Geomorphology. Cambridge University Press. p. 105. ISBN 9781139443463.
  36. ^ French, Robert S.; Showalter, Mark R. (August 2012). "Cupid is doomed: An analysis of the stability of the inner uranian satellites". Icarus. 220 (2): 911–921. arXiv:1408.2543. Bibcode:2012Icar..220..911F. doi:10.1016/j.icarus.2012.06.031. S2CID 9708287.
  37. ^ Archer, David (2009). The Long Thaw: How Humans Are Changing the Next 100,000 Years of Earth's Climate. Princeton University Press. p. 123. ISBN 978-0-691-13654-7.
  38. ^ "Frequently Asked Questions". Hawai'i Volcanoes National Park. 2011. Archived from the original on 27 October 2012. Retrieved 22 October 2011.
  39. ^ Tuthill, Peter; Monnier, John; Lawrance, Nicholas; Danchi, William; et al. (2008). "The Prototype Colliding-Wind Pinwheel WR 104". The Astrophysical Journal. 675 (1): 698–710. arXiv:0712.2111. Bibcode:2008ApJ...675..698T. doi:10.1086/527286. S2CID 119293391.
  40. ^ Tuthill, Peter. "WR 104: Technical Questions". Archived from the original on 3 April 2018. Retrieved 20 December 2015.
  41. ^ Bostrom, Nick (March 2002). "Existential Risks: Analyzing Human Extinction Scenarios and Related Hazards". Journal of Evolution and Technology. 9 (1). Archived from the original on 27 April 2011. Retrieved 10 September 2012.
  42. ^ "Badlands National Park – Nature & Science – Geologic Formations". Archived from the original on 15 February 2015. Retrieved 21 May 2014.
  43. ^ Landstreet, John D. (2003). Physical Processes in the Solar System: An introduction to the physics of asteroids, comets, moons and planets. Keenan & Darlington. p. 121. ISBN 9780973205107. Archived from the original on 28 October 2020. Retrieved 15 March 2020.
  44. ^ "Uranus's colliding moons". astronomy.com. 2017. Archived from the original on 26 February 2021. Retrieved 23 September 2017.
  45. ^ de la Fuente Marcos, Raúl; de la Fuente Marcos, Carlos (2020). "An Update on the Future Flyby of Gliese 710 to the Solar System Using Gaia EDR3: Slightly Closer and a Tad Later than Previous Estimates". Research Notes of the AAS. 4 (12): 222. doi:10.3847/2515-5172/abd18d.
  46. ^ Berski, Filip; Dybczyński, Piotr A. (November 2016). "Gliese 710 will pass the Sun even closer: Close approach parameters recalculated based on the first Gaia data release". Astronomy & Astrophysics. 595: L10. Bibcode:2016A&A...595L..10B. doi:10.1051/0004-6361/201629835. ISSN 0004-6361.
  47. ^ Goldstein, Natalie (2009). Global Warming. Infobase Publishing. p. 53. ISBN 9780816067695. Archived from the original on 7 November 2020. Retrieved 15 March 2020. The last time acidification on this scale occurred (about 65 mya) it took more than 2 million years for corals and other marine organisms to recover; some scientists today believe, optimistically, that it could take tens of thousands of years for the ocean to regain the chemistry it had in preindustrial times.
  48. ^ "Grand Canyon – Geology – A dynamic place". Views of the National Parks. National Park Service. Archived from the original on 25 April 2021. Retrieved 11 October 2020.
  49. ^ Horner, J.; Evans, N. W.; Bailey, M. E. (2004). "Simulations of the Population of Centaurs I: The Bulk Statistics". Monthly Notices of the Royal Astronomical Society. 354 (3): 798–810. arXiv:astro-ph/0407400. Bibcode:2004MNRAS.354..798H. doi:10.1111/j.1365-2966.2004.08240.x. S2CID 16002759.
  50. ^ Haddok, Eitan (29 September 2008). "Birth of an Ocean: The Evolution of Ethiopia's Afar Depression". Scientific American. Archived from the original on 24 December 2013. Retrieved 27 December 2010.
  51. ^ Bilham, Roger (November 2000). "NOVA Online | Everest | Birth of the Himalaya". pbs.org. Archived from the original on 19 June 2021. Retrieved 22 July 2021.
  52. ^ Kirchner, James W.; Weil, Anne (9 March 2000). "Delayed biological recovery from extinctions throughout the fossil record". Nature. 404 (6774): 177–180. Bibcode:2000Natur.404..177K. doi:10.1038/35004564. PMID 10724168. S2CID 4428714.
  53. ^ Wilson, Edward O. (1999). The Diversity of Life. W.W. Norton & Company. p. 216. ISBN 9780393319408. Archived from the original on 4 October 2020. Retrieved 15 March 2020.
  54. ^ Wilson, Edward Osborne (1992). "The Human Impact". The Diversity of Life. London, England: Penguin UK (published 2001). ISBN 9780141931739. Archived from the original on 1 August 2020. Retrieved 15 March 2020.
  55. ^ Bills, Bruce G.; Gregory A. Neumann; David E. Smith; Maria T. Zuber (2005). "Improved estimate of tidal dissipation within Mars from MOLA observations of the shadow of Phobos". Journal of Geophysical Research. 110 (E7). E07004. Bibcode:2005JGRE..110.7004B. doi:10.1029/2004je002376.
  56. ^ a b c d Scotese, Christopher R. "Pangea Ultima will form 250 million years in the Future". Paleomap Project. Archived from the original on 25 February 2019. Retrieved 13 March 2006.
  57. ^ Garrison, Tom (2009). Essentials of Oceanography (5th ed.). Brooks/Cole. p. 62. ISBN 978-1337098649.
  58. ^ "Continents in Collision: Pangea Ultima". NASA. 2000. Archived from the original on 17 April 2019. Retrieved 29 December 2010.
  59. ^ "Geology". Encyclopedia of Appalachia. University of Tennessee Press. 2011. Archived from the original on 21 May 2014. Retrieved 21 May 2014.
  60. ^ Hancock, Gregory; Kirwan, Matthew (January 2007). "Summit erosion rates deduced from 10Be: Implications for relief production in the central Appalachians" (PDF). Geology. 35 (1): 89. Bibcode:2007Geo....35...89H. doi:10.1130/g23147a.1. Archived (PDF) from the original on 23 December 2018. Retrieved 21 May 2014.
  61. ^ Yorath, C. J. (2017). Of rocks, mountains and Jasper: a visitor's guide to the geology of Jasper National Park. Dundurn Press. p. 30. ISBN 9781459736122. [...] 'How long will the Rockies last?' [...] The numbers suggest that in about 50 to 60 million years the remaining mountains will be gone, and the park will be reduced to a rolling plain much like the Canadian prairies.
  62. ^ Dethier, David P.; Ouimet, W.; Bierman, P. R.; Rood, D. H.; et al. (2014). "Basins and bedrock: Spatial variation in 10Be erosion rates and increasing relief in the southern Rocky Mountains, USA" (PDF). Geology. 42 (2): 167–170. Bibcode:2014Geo....42..167D. doi:10.1130/G34922.1. Archived (PDF) from the original on 23 December 2018. Retrieved 22 May 2014.
  63. ^ Patzek, Tad W. (2008). "Can the Earth Deliver the Biomass-for-Fuel we Demand?". In Pimentel, David (ed.). Biofuels, Solar and Wind as Renewable Energy Systems: Benefits and Risks. Springer. ISBN 9781402086533. Archived from the original on 1 August 2020. Retrieved 15 March 2020.
  64. ^ Perlman, David (14 October 2006). "Kiss that Hawaiian timeshare goodbye / Islands will sink in 80 million years". San Francisco Chronicle. Archived from the original on 17 April 2019. Retrieved 21 May 2014.
  65. ^ Nelson, Stephen A. "Meteorites, Impacts, and Mass Extinction". Tulane University. Archived from the original on 6 August 2017. Retrieved 13 January 2011.
  66. ^ Lang, Kenneth R. (2003). The Cambridge Guide to the Solar System. Cambridge University Press. p. 329. ISBN 9780521813068. [...] all the rings should collapse [...] in about 100 million years.
  67. ^ Schröder, K.-P.; Smith, Robert Connon (2008). "Distant future of the Sun and Earth revisited". Monthly Notices of the Royal Astronomical Society. 386 (1): 155–163. arXiv:0801.4031. Bibcode:2008MNRAS.386..155S. doi:10.1111/j.1365-2966.2008.13022.x. S2CID 10073988.
  68. ^ Leong, Stacy (2002). "Period of the Sun's Orbit Around the Galaxy (Cosmic Year)". The Physics Factbook. Archived from the original on 10 August 2011. Retrieved 2 April 2007.
  69. ^ a b c Williams, Caroline; Nield, Ted (20 October 2007). "Pangaea, the comeback". New Scientist. Archived from the original on 13 April 2008. Retrieved 2 January 2014.
  70. ^ Calkin, P. E.; Young, G. M. (1996), "Global glaciation chronologies and causes of glaciation", in Menzies, John (ed.), Past glacial environments: sediments, forms, and techniques, vol. 2, Butterworth-Heinemann, pp. 9–75, ISBN 978-0-7506-2352-0.
  71. ^ a b Perry, Perry; Russel, Thompson (1997). Applied climatology : principles and practice. London, England: Routledge. pp. 127–128. ISBN 9780415141000.
  72. ^ Farnsworth, Alexander; Lo, Y. T. Eunice; Valdes, Paul J.; Buzan, Jonathan R.; et al. (25 September 2023). "Climate extremes likely to drive land mammal extinction during next supercontinent assembly" (PDF). Nature Geoscience. 16 (10): 901–908. Bibcode:2023NatGe..16..901F. doi:10.1038/s41561-023-01259-3.
  73. ^ a b c d e f O'Malley-James, Jack T.; Greaves, Jane S.; Raven, John A.; Cockell, Charles S. (2014). "Swansong Biosphere II: The final signs of life on terrestrial planets near the end of their habitable lifetimes". International Journal of Astrobiology. 13 (3): 229–243. arXiv:1310.4841. Bibcode:2014IJAsB..13..229O. doi:10.1017/S1473550413000426. S2CID 119252386.
  74. ^ Strom, Robert G.; Schaber, Gerald G.; Dawson, Douglas D. (25 May 1994). "The global resurfacing of Venus". Journal of Geophysical Research. 99 (E5): 10899–10926. Bibcode:1994JGR....9910899S. doi:10.1029/94JE00388. S2CID 127759323. Archived from the original on 16 September 2020. Retrieved 6 September 2018.
  75. ^ Hoffman, Paul F. (November 1992). "Rodinia to Gondwanaland to Pangea to Amasia: alternating kinematics of supercontinental fusion". Atlantic Geology. 28 (3): 284. doi:10.4138/1870.
  76. ^ Minard, Anne (2009). "Gamma-Ray Burst Caused Mass Extinction?". National Geographic News. Archived from the original on 5 July 2015. Retrieved 27 August 2012.
  77. ^ "Questions Frequently Asked by the Public About Eclipses". NASA. Archived from the original on 12 March 2010. Retrieved 7 March 2010.
  78. ^ a b c d e f g O'Malley-James, Jack T.; Greaves, Jane S.; Raven, John A.; Cockell, Charles S. (2012). "Swansong Biospheres: Refuges for life and novel microbial biospheres on terrestrial planets near the end of their habitable lifetimes". International Journal of Astrobiology. 12 (2): 99–112. arXiv:1210.5721. Bibcode:2013IJAsB..12...99O. doi:10.1017/S147355041200047X. S2CID 73722450.
  79. ^ a b Heath, Martin J.; Doyle, Laurance R. (2009). "Circumstellar Habitable Zones to Ecodynamic Domains: A Preliminary Review and Suggested Future Directions". arXiv:0912.2482 [astro-ph.EP].
  80. ^ a b c Ward, Peter D.; Brownlee, Donald (2003). Rare earth : why complex life is uncommon in the universe. New York: Copernicus. pp. 117–128. ISBN 978-0387952895.
  81. ^ a b c d Franck, S.; Bounama, C.; Von Bloh, W. (November 2005). "Causes and timing of future biosphere extinction" (PDF). Biogeosciences Discussions. 2 (6): 1665–1679. Bibcode:2006BGeo....3...85F. doi:10.5194/bgd-2-1665-2005. Archived (PDF) from the original on 31 July 2020. Retrieved 2 September 2019.
  82. ^ Bounama, Christine; Franck, S.; Von Bloh, David (2001). "The fate of Earth's ocean". Hydrology and Earth System Sciences. 5 (4): 569–575. Bibcode:2001HESS....5..569B. doi:10.5194/hess-5-569-2001.
  83. ^ Antoja, T.; Helmi, A.; Romero-Gómez, M.; Katz, D.; et al. (19 September 2018). "A dynamically young and perturbed Milky Way disk". Nature. 561 (7723): 360–362. arXiv:1804.10196. Bibcode:2018Natur.561..360A. doi:10.1038/s41586-018-0510-7. PMID 30232428. S2CID 52298687.
  84. ^ a b Schröder, K.-P.; Smith, Robert Connon (1 May 2008). "Distant future of the Sun and Earth revisited". Monthly Notices of the Royal Astronomical Society. 386 (1): 155–163. arXiv:0801.4031. Bibcode:2008MNRAS.386..155S. doi:10.1111/j.1365-2966.2008.13022.x. S2CID 10073988.
  85. ^ a b Brownlee 2010, p. 95.
  86. ^ Brownlee 2010, p. 79.
  87. ^ Li, King-Fai; Pahlevan, Kaveh; Kirschvink, Joseph L.; Yung, Luk L. (2009). "Atmospheric pressure as a natural climate regulator for a terrestrial planet with a biosphere". Proceedings of the National Academy of Sciences of the United States of America. 106 (24): 9576–9579. Bibcode:2009PNAS..106.9576L. doi:10.1073/pnas.0809436106. PMC 2701016. PMID 19487662.
  88. ^ Caldeira, Ken; Kasting, James F. (1992). "The life span of the biosphere revisited". Nature. 360 (6406): 721–723. Bibcode:1992Natur.360..721C. doi:10.1038/360721a0. PMID 11536510. S2CID 4360963.
  89. ^ Franck, S. (2000). "Reduction of biosphere life span as a consequence of geodynamics". Tellus B. 52 (1): 94–107. Bibcode:2000TellB..52...94F. doi:10.1034/j.1600-0889.2000.00898.x.
  90. ^ Lenton, Timothy M.; von Bloh, Werner (2001). "Biotic feedback extends the life span of the biosphere". Geophysical Research Letters. 28 (9): 1715–1718. Bibcode:2001GeoRL..28.1715L. doi:10.1029/2000GL012198.
  91. ^ Lari, Giacomo; Saillenfest, Melaine; Fenucci, Marco (2020). "Long-term evolution of the Galilean satellites: the capture of Callisto into resonance". Astronomy & Astrophysics. 639: A40. arXiv:2001.01106. Bibcode:2020A&A...639A..40L. doi:10.1051/0004-6361/202037445. S2CID 209862163. Retrieved 1 August 2022.
  92. ^ a b c d Kargel, J. S. (2004). Mars: a warmer, wetter planet. Springer-Praxis books in astronomy and space sciences. London; New York : Chichester: Springer; Praxis. p. 509. ISBN 978-1-85233-568-7. Archived from the original on 27 May 2021. Retrieved 29 October 2007.
  93. ^ Neron de Surgey, O.; Laskar, J. (1996). "On the Long Term Evolution of the Spin of the Earth". Astronomy and Astrophysics. 318: 975. Bibcode:1997A&A...318..975N.
  94. ^ a b c Adams 2008, pp. 33–47.
  95. ^ a b c Cox, T. J.; Loeb, Abraham (2007). "The collision between the Milky Way and Andromeda". Monthly Notices of the Royal Astronomical Society. 386 (1): 461–474. arXiv:0705.1170. Bibcode:2008MNRAS.386..461C. doi:10.1111/j.1365-2966.2008.13048.x. S2CID 14964036.
  96. ^ a b Li, King-Fai; Pahlevan, Kaveh; Kirschvink, Joseph L.; Yung, Yuk L. (16 June 2009). "Atmospheric pressure as a natural climate regulator for a terrestrial planet with a biosphere". Proceedings of the National Academy of Sciences of the United States of America. 106 (24): 9576–9579. Bibcode:2009PNAS..106.9576L. doi:10.1073/pnas.0809436106. PMC 2701016. PMID 19487662.
  97. ^ Waszek, Lauren; Irving, Jessica; Deuss, Arwen (20 February 2011). "Reconciling the Hemispherical Structure of Earth's Inner Core With its Super-Rotation". Nature Geoscience. 4 (4): 264–267. Bibcode:2011NatGe...4..264W. doi:10.1038/ngeo1083.
  98. ^ McDonough, W. F. (2004). "Compositional Model for the Earth's Core". Treatise on Geochemistry. Vol. 2. pp. 547–568. Bibcode:2003TrGeo...2..547M. doi:10.1016/B0-08-043751-6/02015-6. ISBN 978-0080437514.
  99. ^ a b Meadows, A. J. (2007). The Future of the Universe. Springer. pp. 81–83. ISBN 9781852339463.
  100. ^ Luhmann, J. G.; Johnson, R. E.; Zhang, M. H. G. (1992). "Evolutionary impact of sputtering of the Martian atmosphere by O+ pickup ions". Geophysical Research Letters. 19 (21): 2151–2154. Bibcode:1992GeoRL..19.2151L. doi:10.1029/92GL02485.
  101. ^ Shlermeler, Quirin (3 March 2005). "Solar wind hammers the ozone layer". News@nature. doi:10.1038/news050228-12.
  102. ^ Adams 2008, pp. 33–44.
  103. ^ "Study: Earth May Collide With Another Planet". Fox News Channel. 11 June 2009. Archived from the original on 4 November 2012. Retrieved 8 September 2011.
  104. ^ Shiga, David (23 April 2008). "Solar system could go haywire before the Sun dies". New Scientist.
  105. ^ Guinan, E. F.; Ribas, I. (2002). Montesinos, Benjamin; Gimenez, Alvaro; Guinan, Edward F. (eds.). "Our Changing Sun: The Role of Solar Nuclear Evolution and Magnetic Activity on Earth's Atmosphere and Climate". ASP Conference Proceedings. 269: 85–106. Bibcode:2002ASPC..269...85G.
  106. ^ Kasting, J. F. (June 1988). "Runaway and moist greenhouse atmospheres and the evolution of earth and Venus". Icarus. 74 (3): 472–494. Bibcode:1988Icar...74..472K. doi:10.1016/0019-1035(88)90116-9. PMID 11538226. Archived from the original on 7 December 2019. Retrieved 6 September 2018.
  107. ^ Chyba, C. F.; Jankowski, D. G.; Nicholson, P. D. (1989). "Tidal Evolution in the Neptune-Triton System". Astronomy and Astrophysics. 219 (1–2): 23. Bibcode:1989A&A...219L..23C.
  108. ^ Cain, Fraser (2007). "When Our Galaxy Smashes into Andromeda, What Happens to the Sun?". Universe Today. Archived from the original on 17 May 2007. Retrieved 16 May 2007.
  109. ^ "NASA's Hubble Shows Milky Way is Destined for Head-On Collision". NASA. 31 May 2012. Archived from the original on 30 April 2020. Retrieved 13 October 2012.
  110. ^ Dowd, Maureen (29 May 2012). "Andromeda Is Coming!". The New York Times. Archived from the original on 8 March 2021. Retrieved 9 January 2014. [NASA's David Morrison] explained that the Andromeda-Milky Way collision would just be two great big fuzzy balls of stars and mostly empty space passing through each other harmlessly over the course of millions of years.
  111. ^ Braine, J.; Lisenfeld, U.; Duc, P. A.; Brinks, E.; et al. (2004). "Colliding molecular clouds in head-on galaxy collisions". Astronomy and Astrophysics. 418 (2): 419–428. arXiv:astro-ph/0402148. Bibcode:2004A&A...418..419B. doi:10.1051/0004-6361:20035732. S2CID 15928576.{{cite journal}}: CS1 maint: overridden setting (link)
  112. ^ a b c d Schroder, K. P.; Smith, Robert Connon (2008). "Distant Future of the Sun and Earth Revisited". Monthly Notices of the Royal Astronomical Society. 386 (1): 155–163. arXiv:0801.4031. Bibcode:2008MNRAS.386..155S. doi:10.1111/j.1365-2966.2008.13022.x. S2CID 10073988.
  113. ^ Taylor, David. "The End Of The Sun". Archived from the original on 12 May 2021. Retrieved 29 July 2021.
  114. ^ Powell, David (22 January 2007). "Earth's Moon Destined to Disintegrate". Space.com. Tech Media Network. Archived from the original on 27 June 2019. Retrieved 1 June 2010.
  115. ^ Lorenz, Ralph D.; Lunine, Jonathan I.; McKay, Christopher P. (15 November 1997). "Titan under a red giant sun: A new kind of "habitable" moon" (PDF). Geophysical Research Letters. 24 (22): 2905–2908. Bibcode:1997GeoRL..24.2905L. CiteSeerX 10.1.1.683.8827. doi:10.1029/97GL52843. ISSN 0094-8276. PMID 11542268. S2CID 14172341. Archived (PDF) from the original on 23 December 2018. Retrieved 21 March 2008.
  116. ^ Rybicki, K; Denis, C. (May 2001). "On the Final Destiny of the Earth and the Solar System". Icarus. 151 (1): 130–137. Bibcode:2001Icar..151..130R. doi:10.1006/icar.2001.6591.{{cite journal}}: CS1 maint: date and year (link)
  117. ^ Balick, Bruce. "Planetary Nebulae and the Future of the Solar System". University of Washington. Archived from the original on 19 December 2008. Retrieved 23 June 2006.
  118. ^ Kalirai, Jasonjot S.; Hansen, Brad M. S.; Kelson, Daniel D.; Reitzel, David B.; et al. (March 2008). "The Initial-Final Mass Relation: Direct Constraints at the Low-Mass End". The Astrophysical Journal. 676 (1): 594–609. arXiv:0706.3894. Bibcode:2008ApJ...676..594K. doi:10.1086/527028. S2CID 10729246.{{cite journal}}: CS1 maint: overridden setting (link)
  119. ^ Kalirai et al. 2008, p. 16. Based upon the weighted least-squares best fit with the initial mass equal to a solar mass.
  120. ^ "Universe May End in a Big Rip". CERN Courier. 1 May 2003. Archived from the original on 24 October 2011. Retrieved 22 July 2011.
  121. ^ "Ask Ethan: Could The Universe Be Torn Apart In A Big Rip?". Forbes. Archived from the original on 2 August 2021. Retrieved 26 January 2021.
  122. ^ Caldwell, Robert R.; Kamionkowski, Marc; Weinberg, Nevin N. (2003). "Phantom Energy and Cosmic Doomsday". Physical Review Letters. 91 (7): 071301. arXiv:astro-ph/0302506. Bibcode:2003PhRvL..91g1301C. doi:10.1103/PhysRevLett.91.071301. PMID 12935004. S2CID 119498512.
  123. ^ Vikhlinin, A.; Kravtsov, A.V.; Burenin, R.A.; Ebeling, H.; et al. (2009). "Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints". The Astrophysical Journal. 692 (2): 1060–1074. arXiv:0812.2720. Bibcode:2009ApJ...692.1060V. doi:10.1088/0004-637X/692/2/1060. S2CID 15719158.{{cite journal}}: CS1 maint: overridden setting (link)
  124. ^ Murray, C. D. & Dermott, S. F. (1999). Solar System Dynamics. Cambridge University Press. p. 184. ISBN 978-0-521-57295-8. Archived from the original on 1 August 2020. Retrieved 27 March 2016.
  125. ^ Dickinson, Terence (1993). From the Big Bang to Planet X. Camden East, Ontario: Camden House. pp. 79–81. ISBN 978-0-921820-71-0.
  126. ^ Canup, Robin M.; Righter, Kevin (2000). Origin of the Earth and Moon. The University of Arizona space science series. Vol. 30. University of Arizona Press. pp. 176–177. ISBN 978-0-8165-2073-2. Archived from the original on 1 August 2020. Retrieved 27 March 2016.
  127. ^ Dorminey, Bruce (31 January 2017). "Earth and Moon May Be on Long-Term Collision Course". Forbes. Archived from the original on 1 February 2017. Retrieved 11 February 2017.
  128. ^ "The Local Group of Galaxies". Students for the Exploration and Development of Space. Archived from the original on 7 January 2019. Retrieved 2 October 2009.
  129. ^ a b Loeb, Abraham (2011). "Cosmology with Hypervelocity Stars". Journal of Cosmology and Astroparticle Physics. 2011 (4). Harvard University: 023. arXiv:1102.0007. Bibcode:2011JCAP...04..023L. doi:10.1088/1475-7516/2011/04/023. S2CID 118750775.
  130. ^ a b c Ord, Toby (5 May 2021). "The Edges of Our Universe". arXiv:2104.01191 [gr-qc].
  131. ^ a b c Busha, Michael T.; Adams, Fred C.; Wechsler, Risa H.; Evrard, August E. (20 October 2003). "Future Evolution of Structure in an Accelerating Universe". The Astrophysical Journal. 596 (2): 713–724. arXiv:astro-ph/0305211. doi:10.1086/378043. ISSN 0004-637X. S2CID 15764445.
  132. ^ Adams, F. C.; Graves, G. J. M.; Laughlin, G. (December 2004). García-Segura, G.; Tenorio-Tagle, G.; Franco, J.; Yorke, H. W. (eds.). "Gravitational Collapse: From Massive Stars to Planets. / First Astrophysics meeting of the Observatorio Astronomico Nacional. / A meeting to celebrate Peter Bodenheimer for his outstanding contributions to Astrophysics: Red Dwarfs and the End of the Main Sequence". Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias. 22: 46–49. Bibcode:2004RMxAC..22...46A. See Fig. 3.
  133. ^ Krauss, Lawrence M.; Starkman, Glenn D. (March 2000). "Life, The Universe, and Nothing: Life and Death in an Ever-Expanding Universe". The Astrophysical Journal. 531 (1): 22–30. arXiv:astro-ph/9902189. Bibcode:2000ApJ...531...22K. doi:10.1086/308434. ISSN 0004-637X. S2CID 18442980.
  134. ^ Adams, Fred C.; Laughlin, Gregory; Graves, Genevieve J. M. (2004). "RED Dwarfs and the End of The Main Sequence" (PDF). Revista Mexicana de Astronomía y Astrofísica, Serie de Conferencias. 22: 46–49. Archived (PDF) from the original on 23 December 2018. Retrieved 21 May 2016.
  135. ^ Loeb, Abraham; Batista, Rafael; Sloan, W. (2016). "Relative Likelihood for Life as a Function of Cosmic Time". Journal of Cosmology and Astroparticle Physics. 2016 (8): 040. arXiv:1606.08448. Bibcode:2016JCAP...08..040L. doi:10.1088/1475-7516/2016/08/040. S2CID 118489638.
  136. ^ "Why the Smallest Stars Stay Small". Sky & Telescope (22). November 1997.
  137. ^ Adams, F. C.; Bodenheimer, P.; Laughlin, G. (2005). "M dwarfs: planet formation and long term evolution". Astronomische Nachrichten. 326 (10): 913–919. Bibcode:2005AN....326..913A. doi:10.1002/asna.200510440.
  138. ^ Tayler, Roger John (1993). Galaxies, Structure and Evolution (2nd ed.). Cambridge University Press. p. 92. ISBN 978-0521367103.
  139. ^ a b c d Adams, Fred; Laughlin, Greg (1999). The Five Ages of the Universe. New York: The Free Press. ISBN 978-0684854229.
  140. ^ Barrow, John D.; Tipler, Frank J. (19 May 1988). The Anthropic Cosmological Principle. foreword by John A. Wheeler. Oxford: Oxford University Press. ISBN 978-0192821478. LC 87-28148. Archived from the original on 1 August 2020. Retrieved 27 March 2016.
  141. ^ Adams, Fred; Laughlin, Greg (1999). The Five Ages of the Universe. New York: The Free Press. pp. 85–87. ISBN 978-0684854229.
  142. ^ a b c d e f g Dyson, Freeman (1979). "Time Without End: Physics and Biology in an Open Universe". Reviews of Modern Physics. 51 (3): 447–460. Bibcode:1979RvMP...51..447D. doi:10.1103/RevModPhys.51.447. Archived from the original on 5 July 2008. Retrieved 5 July 2008.
  143. ^ Baez, John C. (7 February 2016). "The End of the Universe". math.ucr.edu. Archived from the original on 30 May 2009. Retrieved 13 February 2021.
  144. ^ Nishino H, Clark S, Abe K, Hayato Y, et al. (Super-K Collaboration) (2009). "Search for Proton Decay via
    p+
     →
    e+

    π0
     and
    p+
     →
    μ+

    π0
     in a Large Water Cherenkov Detector". Physical Review Letters. 102 (14): 141801. arXiv:0903.0676. Bibcode:2009PhRvL.102n1801N. doi:10.1103/PhysRevLett.102.141801. PMID 19392425. S2CID 32385768.    {{cite journal}}: CS1 maint: overridden setting (link)
  145. ^ a b c d Page, Don N. (1976). "Particle Emission Rates from a Black Hole: Massless Particles from an Uncharged, Nonrotating Hole". Physical Review D. 13 (2): 198–206. Bibcode:1976PhRvD..13..198P. doi:10.1103/PhysRevD.13.198.
  146. ^ Overbye, Denis (16 September 2015). "More Evidence for Coming Black Hole Collision". The New York Times.
  147. ^ L., Logan Richard (2021). "Black holes can help us answer many long-asked questions". Microscopy UK - Science & Education. Micscape. Retrieved 30 May 2023. When galaxies collide, the supermassive black holes in the central contract eventually find their way into the centre of the newly created galaxy where they are ultimately pulled together.
  148. ^ Frautschi, S. (1982). "Entropy in an expanding universe". Science. 217 (4560): 593–599. Bibcode:1982Sci...217..593F. doi:10.1126/science.217.4560.593. PMID 17817517. S2CID 27717447. p. 596: table 1 and section "black hole decay" and previous sentence on that page: "Since we have assumed a maximum scale of gravitational binding – for instance, superclusters of galaxies – black hole formation eventually comes to an end in our model, with masses of up to 1014M☉ ... the timescale for black holes to radiate away all their energy ranges ... to 10106 years for black holes of up to 1014M☉"
  149. ^ Andreassen, Anders; Frost, William; Schwartz, Matthew D. (12 March 2018). "Scale-invariant instantons and the complete lifetime of the standard model". Physical Review D. 97 (5): 056006. arXiv:1707.08124. Bibcode:2018PhRvD..97e6006A. doi:10.1103/PhysRevD.97.056006. S2CID 118843387.
  150. ^ Caplan, M. E. (7 August 2020). "Black Dwarf Supernova in the Far Future". MNRAS. 497 (1–6): 4357–4362. arXiv:2008.02296. Bibcode:2020MNRAS.497.4357C. doi:10.1093/mnras/staa2262. S2CID 221005728.
  151. ^ Carroll, Sean M.; Chen, Jennifer (27 October 2004). "Spontaneous Inflation and the Origin of the Arrow of Time". arXiv:hep-th/0410270.
  152. ^ Tegmark, Max (7 February 2003). "Parallel universes. Not just a staple of science fiction, other universes are a direct implication of cosmological observations". Scientific American. 288 (5): 40–51. arXiv:astro-ph/0302131. Bibcode:2003SciAm.288e..40T. doi:10.1038/scientificamerican0503-40. PMID 12701329.
  153. ^ Tegmark, Max (7 February 2003). Barrow, J. D.; Davies, P. C. W.; Harper, C. L. (eds.). "Parallel Universes". In "Science and Ultimate Reality: From Quantum to Cosmos", Honoring John Wheeler's 90th Birthday. 288 (5): 40–51. arXiv:astro-ph/0302131. Bibcode:2003SciAm.288e..40T. doi:10.1038/scientificamerican0503-40. PMID 12701329.
  154. ^ Douglas, M. (21 March 2003). "The statistics of string / M theory vacua". JHEP. 0305 (46): 046. arXiv:hep-th/0303194. Bibcode:2003JHEP...05..046D. doi:10.1088/1126-6708/2003/05/046. S2CID 650509.
  155. ^ Ashok, S.; Douglas, M. (2004). "Counting flux vacua". JHEP. 0401 (60): 060. arXiv:hep-th/0307049. Bibcode:2004JHEP...01..060A. doi:10.1088/1126-6708/2004/01/060. S2CID 1969475.
  156. ^ "Hurtling Through the Void". Time. 20 June 1983. Archived from the original on 22 December 2008. Retrieved 5 September 2011.
  157. ^ Staub, D.W. (25 March 1967). SNAP 10 Summary Report. Atomics International Division of North American Aviation, Inc., Canoga Park, California. NAA-SR-12073.
  158. ^ "U.S. ADMISSION: Satellite mishap released rays". The Canberra Times. Vol. 52, no. 15, 547. Australian Capital Territory, Australia. 30 March 1978. p. 5. Archived from the original on 21 August 2021. Retrieved 12 August 2017 – via National Library of Australia., "Launched in 1965 and carrying about 4.5 kilograms of uranium 235, Snap 10A is in a 1,000-year orbit ..."
  159. ^ Conception Archived 19 July 2011 at the Wayback Machine Official Zeitpyramide website. Retrieved 14 December 2010.
  160. ^ Linder, Courtney (15 November 2019). "Microsoft is Storing Source Code in an Arctic Cave". Popular Mechanics. Archived from the original on 16 March 2021. Retrieved 25 July 2021.
  161. ^ "Permanent Markers Implementation Plan" (PDF). United States Department of Energy. 30 August 2004. Archived from the original (PDF) on 28 September 2006.
  162. ^ "How do we warn future generations about our toxic waste?". newhumanist.org.uk. 5 May 2022. Retrieved 14 August 2022.
  163. ^ "The Long Now Foundation". The Long Now Foundation. 2011. Archived from the original on 16 June 2021. Retrieved 21 September 2011.
  164. ^ "A Visit to the Doomsday Vault". CBS News. 20 March 2008. Archived from the original on 8 March 2021. Retrieved 5 January 2018.
  165. ^ Smith, Cameron; Davies, Evan T. (2012). Emigrating Beyond Earth: Human Adaptation and Space Colonization. Springer. p. 258. ISBN 978-1-4614-1165-9.
  166. ^ Klein, Jan; Takahata, Naoyuki (2002). Where Do We Come From?: The Molecular Evidence for Human Descent. Springer. p. 395. ISBN 978-3-662-04847-4.
  167. ^ Greenberg, Joseph (1987). Language in the Americas. Stanford University Press. pp. 341–342. ISBN 978-0804713153.
  168. ^ Blakemore, Erin (17 May 2019). "Chernobyl disaster facts and information". Culture. National Geographic. Retrieved 5 November 2024.
  169. ^ Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; et al. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF). Chinese Physics C. 41 (3): 030001. Bibcode:2017ChPhC..41c0001A. doi:10.1088/1674-1137/41/3/030001.
  170. ^ Time: Disasters that Shook the World. New York City: Time Home Entertainment. 2012. ISBN 978-1-60320-247-3.
  171. ^ "Cornell News: "It's the 25th Anniversary of Earth's First (and only) Attempt to Phone E.T."". Cornell University. 12 November 1999. Archived from the original on 2 August 2008. Retrieved 29 March 2008.
  172. ^ Deamer, Dave. "In regard to the email from". Science 2.0. Archived from the original on 24 September 2015. Retrieved 14 November 2014.
  173. ^ "Interpretation of NTFS Timestamps". Forensic Focus. 6 April 2013. Archived from the original on 8 March 2021. Retrieved 31 July 2021.
  174. ^ a b c d e f g h Bailer-Jones, Coryn A. L.; Farnocchia, Davide (3 April 2019). "Future stellar flybys of the Voyager and Pioneer spacecraft". Research Notes of the American Astronomical Society. 3 (59): 59. arXiv:1912.03503. Bibcode:2019RNAAS...3...59B. doi:10.3847/2515-5172/ab158e. S2CID 134524048.
  175. ^ Artaxo, Paulo; Berntsen, Terje; Betts, Richard; Fahey, David W.; et al. (February 2018). "Changes in Atmospheric Constituents and in Radiative Forcing" (PDF). Intergovernmental Panel on Climate Change. p. 212. Archived (PDF) from the original on 18 February 2019. Retrieved 17 March 2021.
  176. ^ McKay, Christopher P.; Toon, Owen B.; Kasting, James F. (8 August 1991). "Making Mars habitable". Nature. 352 (6335): 489–496. Bibcode:1991Natur.352..489M. doi:10.1038/352489a0. PMID 11538095. S2CID 2815367. Archived from the original on 8 March 2021. Retrieved 23 June 2019.
  177. ^ Kaku, Michio (2010). "The Physics of Interstellar Travel: To one day, reach the stars". mkaku.org. Archived from the original on 10 February 2014. Retrieved 29 August 2010.
  178. ^ Biello, David (28 January 2009). "Spent Nuclear Fuel: A Trash Heap Deadly for 250,000 Years or a Renewable Energy Source?". Scientific American. Archived from the original on 10 July 2021. Retrieved 5 January 2018.
  179. ^ "Date - JavaScript". developer.mozilla.org. Mozilla. Archived from the original on 21 July 2021. Retrieved 27 July 2021.
  180. ^ "Memory of Mankind". Archived from the original on 16 July 2021. Retrieved 4 March 2019.
  181. ^ "Human Document Project 2014". Archived from the original on 19 May 2014. Retrieved 19 May 2014.
  182. ^ "Time it takes for garbage to decompose in the environment" (PDF). New Hampshire Department of Environmental Services. Archived from the original (PDF) on 9 June 2014. Retrieved 23 May 2014.
  183. ^ Lyle, Paul (2010). Between Rocks And Hard Places: Discovering Ireland's Northern Landscapes. Geological Survey of Northern Ireland. ISBN 978-0337095870.
  184. ^ Weisman, Alan (10 July 2007). The World Without Us. New York: Thomas Dunne Books/St. Martin's Press. pp. 171–172. ISBN 978-0-312-34729-1. OCLC 122261590.
  185. ^ "Apollo 11 – First Footprint on the Moon". Student Features. NASA. Archived from the original on 3 April 2021. Retrieved 26 May 2014.
  186. ^ a b "The Pioneer Missions". NASA. Archived from the original on 29 June 2011. Retrieved 5 September 2011.
  187. ^ Avise, John; D. Walker; G. C. Johns (22 September 1998). "Speciation durations and Pleistocene effects on vertebrate phylogeography". Philosophical Transactions of the Royal Society B. 265 (1407): 1707–1712. doi:10.1098/rspb.1998.0492. PMC 1689361. PMID 9787467.
  188. ^ Valentine, James W. (1985). "The Origins of Evolutionary Novelty And Galactic Colonization". In Finney, Ben R.; Jones, Eric M. (eds.). Interstellar Migration and the Human Experience. University of California Press. p. 274. ISBN 978-0520058781.
  189. ^ Wilson, Jason; Staley, Joshua M.; Wyckoff, Gerald J. (7 February 2020). "Extinction of chromosomes due to specialization is a universal occurrence". Scientific Reports. 10 (1): 2170. doi:10.1038/s41598-020-58997-2. ISSN 2045-2322. PMC 7005762. Retrieved 9 December 2024.
  190. ^ Weisman, Alan (10 July 2007). The World Without Us. New York: Thomas Dunne Books/St. Martin's Press. p. 182. ISBN 978-0-312-34729-1. OCLC 122261590.
  191. ^ Gott, J. Richard (May 1993). "Implications of the Copernican principle for our future prospects". Nature. 363 (6427): 315–319. Bibcode:1993Natur.363..315G. doi:10.1038/363315a0. ISSN 0028-0836. S2CID 4252750.{{cite journal}}: CS1 maint: date and year (link)
  192. ^ Lasher, Lawrence. "Pioneer Mission Status". NASA. Archived from the original on 8 April 2000. [Pioneer's speed is] about 12 km/s... [the plate etching] should survive recognizable at least to a distance ≈10 parsecs, and most probably to 100 parsecs.
  193. ^ "LAGEOS 1, 2". NASA. Archived from the original on 21 July 2011. Retrieved 21 July 2012.
  194. ^ Bignami, Giovanni F.; Sommariva, Andrea (2013). A Scenario for Interstellar Exploration and Its Financing. Springer. p. 23. Bibcode:2013sief.book.....B. ISBN 9788847053373.
  195. ^ Zalasiewicz, Jan (25 September 2008). The Earth After Us: What legacy will humans leave in the rocks?. Oxford University Press., Review in Stanford Archaeology
  196. ^ Begtrup, G. E.; Gannett, W.; Yuzvinsky, T. D.; Crespi, V. H.; et al. (13 May 2009). "Nanoscale Reversible Mass Transport for Archival Memory" (PDF). Nano Letters. 9 (5): 1835–1838. Bibcode:2009NanoL...9.1835B. CiteSeerX 10.1.1.534.8855. doi:10.1021/nl803800c. PMID 19400579. Archived from the original (PDF) on 22 June 2010.
  197. ^ Abumrad, Jad; Krulwich, Robert (12 February 2010). Carl Sagan And Ann Druyan's Ultimate Mix Tape. Radiolab (Radio). NPR.
  198. ^ Korycansky, D. G.; Laughlin, Gregory; Adams, Fred C. (2001). "Astronomical engineering: a strategy for modifying planetary orbits". Astrophysics and Space Science. 275 (4): 349–366. arXiv:astro-ph/0102126. Bibcode:2001Ap&SS.275..349K. doi:10.1023/A:1002790227314. hdl:2027.42/41972. S2CID 5550304. Astrophys.Space Sci.275:349-366, 2001.
  199. ^ Korycansky, D. G. (2004). "Astroengineering, or how to save the Earth in only one billion years" (PDF). Revista Mexicana de Astronomía y Astrofísica. 22: 117–120. Bibcode:2004RMxAC..22..117K. Archived (PDF) from the original on 23 September 2015. Retrieved 7 September 2014.
  200. ^ "Date/Time Conversion Contract Language" (PDF). Office of Information Technology Services, New York (state). 19 May 2019. Archived (PDF) from the original on 30 April 2021. Retrieved 16 October 2020.
  201. ^ Zhang, J.; Gecevičius, M.; Beresna, M.; Kazansky, P. G. (2014). "Seemingly unlimited lifetime data storage in nanostructured glass". Phys. Rev. Lett. 112 (3): 033901. Bibcode:2014PhRvL.112c3901Z. doi:10.1103/PhysRevLett.112.033901. PMID 24484138. S2CID 27040597. Archived from the original on 2 August 2021. Retrieved 6 September 2018.
  202. ^ Zhang, J.; Gecevičius, M.; Beresna, M.; Kazansky, P. G. (June 2013). "5D Data Storage by Ultrafast Laser Nanostructuring in Glass" (PDF). CLEO: Science and Innovations: CTh5D–9. Archived from the original (PDF) on 6 September 2014.

Bibliography

Quelle: https://en.wikipedia.org/wiki/7th_millennium