- (15760) 1992 QB1
- (45) Eugenia I Petit-Prince
- (50000) Quaoar
- 1017 Jacqueline
- 101955 Bennu
- 10199 Chariklo
- 128 Nemesis
- 12 Victoria
- 132524 APL
- 1388 Aphrodite
- 141 Lumen
- 14 Andromedae b
- 164 Eva
- 1761 Edmondson
- 1946
- 1977
- 1990
- 2001 Mars Odyssey
- 2002 AA29
- 2006
- 2006 definition of planet
- 2009 satellite collision
- 2020 SO
- 2060 Chiron
- 210 Isabella
- 2141 AG13
- 243 Ida
- 245 Vera
- 247 Eukrate
- 2730 Barks
- 28978 Ixion
- 2M1207
- 2M1207b
- 2 Pallas
- 2dF Galaxy Redshift Survey
- 355 Gabriella
- 3753 Cruithne
- 3C58
- 3 Juno
- 4163 Saaremaa
- 4546B
- 45 Eugenia
- 4659 Roddenberry
- 4660 Nereus
- 503 Evelyn
- 5409 Saale
- 5535 Annefrank
- 55 Cancri
- 55 Cancri e
- 55 Pandora
- 577 Rhea
- 6099 Saarland
- 6127 Hetherington
- 6223 Dahl
- 7166 Kennedy
- 85 lo
- 86 Semele
- 87 Sylvia
- 88 Thisbe
- 89 Julia
- 9007 James Bond
- 99942 Apophis
- 9P/Tempel
- AZ Space
- Abell 1201
- Aberration
- Absolute magnitude
- Absorption line
- Accretion
- Adiri
- Adrastea
- Age of the Earth
- Age of the universe
- Albedo
- Albiorix
- Aldebaran
- Alpha Centauri
- Alpha Centauri A
- Alpha Centauri B
- Altair
- Amalthea
- Andromeda
- Andromeda Galaxy
- Angular diameter
- Antares
- Antichton
- Antimatter
- Antiparticle
- Antiverse
- Apollo-Saturn V Center
- Apollo 1
- Apollo 10
- Apollo 11
- Apollo 12
- Apollo 13
- Apollo 14
- Apollo 15
- Apollo 16
- Apollo 17
- Apollo 5
- Apollo 7
- Apollo 8
- Apollo 9
- Apollo Program Overview
- Apparent magnitude
- Apsis
- Aquarius (constellation)
- Argument of periapsis
- Argument of the perihelion
- Ariel
- Arthur Eddington
- Asterism
- Asteroid
- Asteroid 2444
- Asteroid 444
- Asteroid belt
- Asteroid family
- Asteroid moon
- Astrodynamics
- Astronauts
- Astronomer
- Astronomical object
- Astronomical symbols
- Astronomical unit
- Astronomy
- Astrophysics
- Atlantis (OV-104)
- Atlas
- Atmosphere
- Atmospheric escape
- Atmospheric layers
- Automated Transfer Vehicle
- Autonoe
- Axial tilt
- BO Carinae
- Barnard 1
- Barnard 10
- Barnard 100
- Barnard 101
- Barnard 102
- Barnard 103
- Barnard 104
- Barnard 105
- Barnard 106
- Barnard 107
- Barnard 108
- Barnard 109
- Barnard 11
- Barnard 110
- Barnard 111
- Barnard 112
- Barnard 113
- Barnard 114
- Barnard 115
- Barnard 116
- Barnard 117
- Barnard 117а
- Barnard 118
- Barnard 119
- Barnard 119а
- Barnard 12
- Barnard 120
- Barnard 121
- Barnard 122
- Barnard 123
- Barnard 124
- Barnard 125
- Barnard 126
- Barnard 127
- Barnard 128
- Barnard 129
- Barnard 13
- Barnard 130
- Barnard 131
- Barnard 132
- Barnard 133
- Barnard 134
- Barnard 135
- Barnard 136
- Barnard 137
- Barnard 138
- Barnard 139
- Barnard 14
- Barnard 140
- Barnard 141
- Barnard 142
- Barnard 15
- Barnard 16
- Barnard 17
- Barnard 18
- Barnard 19
- Barnard 2
- Barnard 20
- Barnard 21
- Barnard 22
- Barnard 23
- Barnard 24
- Barnard 25
- Barnard 26
- Barnard 27
- Barnard 28
- Barnard 29
- Barnard 3
- Barnard 30
- Barnard 31
- Barnard 32
- Barnard 33
- Barnard 34
- Barnard 35
- Barnard 36
- Barnard 37
- Barnard 38
- Barnard 39
- Barnard 4
- Barnard 40
- Barnard 41
- Barnard 42
- Barnard 43
- Barnard 44
- Barnard 44а
- Barnard 45
- Barnard 46
- Barnard 47
- Barnard 48
- Barnard 49
- Barnard 5
- Barnard 50
- Barnard 51
- Barnard 53
- Barnard 54
- Barnard 55
- Barnard 56
- Barnard 57
- Barnard 58
- Barnard 59
- Barnard 6
- Barnard 60
- Barnard 61
- Barnard 62
- Barnard 63
- Barnard 64
- Barnard 65
- Barnard 66
- Barnard 67
- Barnard 67а
- Barnard 68
- Barnard 69
- Barnard 7
- Barnard 70
- Barnard 71
- Barnard 72
- Barnard 73
- Barnard 74
- Barnard 75
- Barnard 76
- Barnard 77
- Barnard 78
- Barnard 79
- Barnard 8
- Barnard 80
- Barnard 81
- Barnard 82
- Barnard 83
- Barnard 83а
- Barnard 84
- Barnard 84а
- Barnard 85
- Barnard 86
- Barnard 87
- Barnard 88
- Barnard 89
- Barnard 9
- Barnard 90
- Barnard 91
- Barnard 92
- Barnard 93
- Barnard 94
- Barnard 95
- Barnard 96
- Barnard 97
- Barnard 98
- Barnard 99
- Bayer designation
- Beta Canum Venaticorum
- Betelgeuse
- Big Bang
- Billion
- Binary star
- Binary system (astronomy)
- Binoculars
- Black Hol
- Black dwarf
- Black hole
- Black hole collision
- Black hole cosmology
- Blue Giant
- Blue origin
- Bond albedo
- Boötes Void
- Brown dwarf
- Buran
- Buran (spacecraft)
- Buran program
- Buzz Aldrin
- COROT-7b
- CT Chamaeleontis b
- Calhatopia
- Callisto
- Calypso
- Canceled Apollo missions
- Cape Canaveral
- Capella
- Carbon planet
- Cassini-Huygens
- Cat's Eye Nebula
- Catalog Barnard
- Celestial coordinate system
- Celestial mechanics
- Celestial sphere
- Centaur
- Center of mass
- Ceres
- Challenger (OV-099)
- Chandrayaan-3
- Chandryaan-3
- Charles Greeley Abbot
- Charon (moon)
- China National Space Administration
- Chiron
- Chris Hadfield
- Chrysalis
- Chthonian planet
- Circumbinary Planet
- Circumstellar habitable zone
- Cislunar space
- Clearing the neighborhood
- Clouds
- Coluban
- Columbia (OV-102)
- Comet
- Constellation
- Contact binary
- Contrails
- Coordinated Universal Time
- Copper 9
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