This is a list of Astronomical related discoveries, events, and more that occurred in 2013.
January[]
- 2013 BP73, a near earth asteroid, is discovered.
February[]
- Kepler-37b is discovered.
- Kepler-37c is discovered.
- Kepler-37d is discovered.
- Kepler-68b is discovered.
- Kepler-68c is discovered.
- Kepler-68d is discovered.
March[]
- 2013 EC, a near earth asteroid, is discovered.
- 2013 ET, a near earth asteroid, is discovered.
April[]
- Kepler-62b is discovered.
- Kepler-62c is discovered.
- Kepler-62d is discovered.
- Kepler-62e is discovered.
- Kepler-62f is discovered.
- Kepler-69b is discovered.
- Kepler-69c is discovered.
May[]
- Kepler-76b is discovered.
June[]
- 2013 MZ5, a near earth asteroid, is discovered.
July[]
- July 1: Hippocamp is discovered.
August[]
- August 8: Contact is lost with the Deep Impact spacecraft.
September[]
- Lunar Atmosphere and Dust Environment Explorer is launched.
October[]
- Kepler-87c is discovered.
- PSO J318.5-22 is discovered.
- Lunar Atmosphere and Dust Environment Explorer enters the lunar atmosphere.
- Kepler-56 is discovered.
- Kepler-56 b is discovered.
- Kepler-56 c is discovered.
- Kepler-56 d is speculated to exist.
- WASP-76 b is discovered.
- WASP-82 b is discovered.
- WASP-84 b is discovered.
- WASP-90 b is discovered.
- WASP-95 b is discovered.
- WASP-96 b is discovered.
- WASP-97 b is discovered.
- WASP-98 b is discovered.
- WASP-99 b is discovered.
- WASP-100 b is discovered.
- WASP-101 b is discovered.
- The total amount of extrasolar planets discovered skyrockets to 1010 planets.
- October 9: Juno (spacecraft) makes a flyby of Earth.
Unknown date[]
- GJ 504 b is discovered.
- Gliese 667 Cd is discovered.
- Gliese 667 Ce is discovered.
- Gliese 667 Cf is discovered.
- Gliese 667 Cg is discovered.
- Gliese 667 Ch is discovered.
- Kepler-61b is discovered.
- Kepler-65 is discovered.
- Kepler-66 is discovered.
- Kepler-67 is discovered.
- Kepler-78b is discovered.
- NGC 6811 is discovered.
- GD 61, an asteroid with liquid water, is discovered.
- VVV BD001, a brown dwarf, is discovered.
- WISE 0647-6232, a brown dwarf, is discovered.
- WISE 1049-5319 (also known as Luhman 16), a binary brown dwarf, is discovered.
- WISE J0457-0207, a brown dwarf, is discovered.
- WISE J0521+1025, a brown dwarf, is discovered.
- WISE J140533.32+835030.5, a brown dwarf, is discovered.
- WISE J2030+0749, a brown dwarf, is discovered.