Alpha Centauri b
Alpha Centauri b (or planet "b" of Alpha Centauri) may refer to:
Stars
- alpha Centauri B (Toliman), the second largest star in the α Cen trinary system
Planets
- alpha Centauri Ab, an unconfirmed candidate exoplanet orbiting the largest star in the α Cen trinary star system, Rigel Kentarus (α Cen A)
- alpha Centauri Bb, a proposed exoplanet orbiting the second largest star in the α Cen trinary star system, Toliman (α Cen B)
- alpha Centauri Cb, an exoplanet orbiting the smallest star in the α Cen trinary star system, Proxima (α Cen C)