Category:20th century in outer space 15th16th17th18th19th20th21st22nd23rd24th25th Subcategories This category has the following 11 subcategories, out of 11 total. 0–9 1940s in outer space (4 C, 1 P) 1950s in outer space (11 C) 1960s in outer space (12 C) 1970s in outer space (12 C) 1980s in outer space (11 C) 1990s in outer space (11 C)A Astronomical objects discovered in the 20th century (101 C)E 20th-century astronomical events (3 C, 10 P)S 20th-century solar eclipses (224 P) Space Age (2 C, 24 P) 20th century in spaceflight (8 C, 2 P)
