User:Spacepotato/Unsorted

• 1E161348-5055
• 2006 definition of planet
• 2dF Galaxy Redshift Survey
• 2MASS
• 2MASS 0532+8246
• 2MASS J07491255+5552336
• 3C 191
• 3C 212
• 3C236
• 3C 273
• 3C 279
• 3C 295
• 3C 305
• 3C 390.3
• 3C 449
• 3C 47
• 3C 48
• 3C58
• 3C 75
• 3C 83.1B
• 3C 9
• 3D/Biela
• 4C 37.11
• 4Frontiers Corporation
• 4U 0142+61
• 4U 0614+091
• 4U 1700-37
• 5D/Brorsen
• 6Q0B44E
• A1689-zD1
• AB Doradus moving group
• Abell 1689
• Abell 1835
• Abell 1835 IR1916
• Abell 2029
• Abell 2218
• Abell 2667
• Abell 3266
• Abell 400
• Abell 520
• Abell 754
• Abell catalogue
• Abell S740
• Abeona Mons
• Accelerating universe
• Accretion disc
• Achernar
• Achondrite
• Acidalia Planitia
• ACIGA
• Active galactic nucleus
• Adam Block
• A. David Andrews
• Adélie Land meteorite
• Adeona family
• Adhil
• Adrastea (moon)
• Adrián Galád
• ADS 16402
• AdS black hole
• Advanced Composition Explorer
• Advanced Technology Solar Telescope
• Aegir (moon)
• AEGIS (astronomy)
• AFGL 2591
• Age of the universe
• AIGO
• Air Force Maui Optical and Supercomputing observatory
• Air Quality Index
• Air quality modeling
• Air shower (physics)
• Airy-0
• Airy (Martian crater)
• Aitken Double Star Catalogue
• Aitne (moon)
• Åke Wallenquist
• Akihiko Tago
• Akimasa Nakamura
• Akira Natori
• Akna Montes
• Aladin Sky Atlas
• Alain Maury
• Alamo bolide impact
• Alan C. Gilmore
• Alan Hale (astronomer)
• Alan Magee
• A. Laurent
• Alba Patera
• Albareto (meteorite)
• Albert F. A. L. Jones
• Albert George Wilson
• Albert Marth
• Albiorix (moon)
• Albireo
• Albor Tholus
• Alcides Moreno
• Aldebaran
• Alderaan (astronomy)
• Aldo Di Clemente
• Alexander F. I. Forbes
• Alexander Pravda
• Alexandre Schaumasse
• Alex Cruz
• Alexis Brandeker
• Alfred Bohrmann
• Alfredo Caronia
• Alfred Schmitt
• Algol
• Algol paradox
• Algol variable
• ALH84001
• Alíz Derekas
• Allan Sandage
• Allende meteorite
• All Sky Automated Survey
• Al Niyat
• Alpha² Canum Venaticorum variable
• Alphabus
• Alpha Centaurids
• Alpha Cygni variable
• Alpha Persei Cluster
• Alphard
• Alpher-Bethe-Gamow paper
• Alphonse Louis Nicolas Borrelly
• Altair
• Altair (spacecraft)
• Al Thalimain
• Álvaro López-García
• Alvin (crater)
• AM 0644-741
• AM-2
• Amalthea (moon)
• Amazonis Planitia
• AMC-18 (satellite)
• AMC 3
• AM CVn star
• American Association of Variable Star Observers
• Ametlla de Mar Observatory
• Amor asteroid records
• Amphidromic point
• Amphoterite
• Am star
• Amy B. Jordan (astronomer)
• Anala Mons
• Analemma
• Ananke group
• Ananke (moon)
• Andrea Boattini
• Andrea Di Paola
• André Patry
• Andrew Graham (astronomer)
• Andrew Lowe
• Andromeda Galaxy
• Andromeda I
• Andromeda II
• Andromeda III
• Andromeda IV
• Andromeda IX
• Andromeda-Milky Way collision
• Andromeda's satellite galaxies
• Andromeda V
• Andromeda VIII
• Andromeda X
• Andromedids
• Àngel López
• Anglo-Australian Near-Earth Asteroid Survey
• Angular size redshift relation
• Anik (satellite)
• Anlaug Amanda Djupvik
• Annibale de Gasparis
• Anomalous X-ray pulsar
• ANSMET
• Antares
• Antennae Galaxies
• Anthe (moon)
• Anthropic principle
• Anticenter shell
• Anti-greenhouse effect
• Antitaenite
• Antlia Cluster
• Antlia Dwarf
• Antoniadi (Martian crater)
• Antonín Mrkos
• Antonio Vagnozzi
• Anton Staus
• Aoede (moon)
• Apache Point Observatory Lunar Laser-ranging Operation
• Ap and Bp star
• APM 08279+5255
• Apollo 1 Hills
• Apollo Applications Program
• Apollo asteroid records
• Apollo Lunar Module
• Apollo Lunar Surface Experiments Package
• Apollo program
• Apparent horizon
• Apparent weight
• Appearance of extrasolar planets
• April 2005 lunar eclipse
• Apse line
• Apsis
• Apstar VI
• Aquariids
• Aquarius Dwarf
• Aram Chaos
• Arcadia Planitia
• Arche (moon)
• Arches Cluster
• Arctic Mars Analog Svalbard Expedition (AMASE) 2006
• Arcturus
• Arcturus stream
• ArDM
• Ardra (nakshatra)
• Areocentric orbit
• Areostationary orbit
• Areosynchronous orbit
• Ares Vallis
• Argo (crater)
• Argo Navis
• Argument of periapsis
• Argyre Planitia
• Ariel (moon)
• Arietids
• Arjuna asteroid
• Armstrong Limit
• Arno Arthur Wachmann
• Arnold Richard Klemola
• Arp 104
• Arp 107
• Arp 220
• Arp 299
• Arp 87
• Artemis Project
• Arthur C. Clarke
• Artificial gravity
• Asalesha Nakshatram
• Ascraeus Mons
• Ashen light
• Ashvini
• Asiago-DLR Asteroid Survey
• Aspects of Venus
• Assyrian eclipse
• Asterism (astronomy)
• Asteroid belt
• Asteroid deflection strategies
• Asteroid family
• Asteroid moon
• Asteroid spectral types
• Asteroseismology
• Astos
• Astra 1B
• Astra 1C
• Astra 1D
• Astra 1KR
• Astra 2A
• Astra 2D
• Astrobotic Technology
• Astrology
• Astrology and astronomy
• Astrometric binary
• Astronomer
• Astronomical algorithm
• Astronomical catalog
• Astronomical constant
• Astronomical naming conventions
• Astronomical object
• Astronomical seeing
• Astronomical survey
• Astronomical symbols
• Astronomical transit
• Astronomical unit
• Astronomische Gesellschaft Katalog
• Astronomy
• Astronomy in Chile
• Astronomy on Mars
• Astrophysical maser
• Asymptotic giant branch
• Ataxite
• Aten asteroid records
• Athabasca Valles
• ATHLETE (robot)
• Atlantis basin
• Atlas (moon)
• Atlas of Peculiar Galaxies
• Atmosphere
• Atmosphere of Jupiter
• Atmosphere of Mars
• Atmosphere of Mercury
• Atmosphere of the Moon
• Atmosphere of Titan
• Atmosphere of Triton
• Atmosphere of Uranus
• Atmosphere of Venus
• Atmosphere (unit)
• Atmospheric diffraction
• Atmospheric Dispersion
• Atmospheric duct
• Atmospheric escape
• Atmospheric models
• Atmospheric pressure
• Atmospheric waveguide
• Atsuo Asami
• Atsushi Sugie
• Atsushi Takahashi
• Atutahi
• A-type asteroid
• Aubrite
• Audrey C. Delsanti
• August 1989 lunar eclipse
• August 2007 lunar eclipse
• August 2008 lunar eclipse
• August 2009 lunar eclipse
• Augusta family
• Auguste Charlois
• August Kopff
• Augusto Testa
• Aurorae Sinus
• Australia Mars Analog Research Station
• Autonoe (moon)
• Avernus Colles
• A V star
• Award star
• Axino
• Axion
• AX J0851.9-4617
• AXP 1E 1048-59
• Azuara impact structure
• Azure Dragon
• Baade's Window
• Babcock Model
• Badlands Observatory
• Baetylus
• Baily's beads
• Balanced flow
• Baptistina family
• Barium star
• Barnacle Bill (Mars)
• Barnard 147
• Barnard (Martian crater)
• Barnard's Loop
• Barnard's Star
• Barnes-Hut simulation
• Barometric formula
• Barred irregular galaxy
• Barred lenticular galaxy
• Barred spiral galaxy
• Barringer Medal
• Baryogenesis
• Baryonic dark matter
• Bastille Day event
• BATTeRS
• Battle of Halys (585 BC)
• Bayer designation
• Beagle (crater)
• Beardsley meteorite
• Bebhionn (moon)
• Becquerel (Martian crater)
• Bediasite
• Beehive Cluster
• Beer (Martian crater)
• Behenian fixed star
• Beijing Schmidt CCD Asteroid Program
• Belinda (moon)
• Bench Crater meteorite
• Benjamin Jekhowsky
• Bergelmir (moon)
• Be star
• Bestla (moon)
• Beta Cephei variable
• Beta Lyrae variable
• Beta Pictoris Moving Group
• Beta Taurids
• Betelgeuse
• Be X-ray binaries
• Bharani
• Bṛhaspati
• Bianca (moon)
• Bianchi classification
• Biblis Patera
• Bi-elliptic transfer
• Big Bang
• Big Bang nucleosynthesis
• Big Bang Observer
• Big Bounce
• Big Crunch
• Big Dipper
• Big Rip
• Binary pulsar
• Binary star
• Binary stars in fiction
• Binary system (astronomy)
• Bipolar nebula
• Bipolar outflow
• Birkat HaHammah
• Bisei Spaceguard Center
• BKL singularity
• Black brane
• Black drop effect
• Black dwarf
• Blackett effect
• Black Eye Galaxy
• Black hole
• Black hole electron
• Black hole information paradox
• Black hole thermodynamics
• Black moon
• Black Stone
• Black string
• Black Tortoise
• Blazar
• BL Lac object
• Blue blobs
• Blue compact dwarf galaxy
• Blue dwarf (red dwarf stage)
• Blue giant
• Blue moon
• Blue shift
• Blue straggler
• Blue supergiant
• Bohdan Paczyński
• Bok globule
• Boltzmann brain
• Bond (Chinese constellation)
• Bonneville (crater)
• Bonnor-Ebert mass
• Book of Fixed Stars
• Boomerang Nebula
• Boötes Dwarf Galaxy
• Boötes void
• Borasisi
• Boss General Catalogue
• Bouguer anomaly
• Bouguer plate
• Bounce Rock
• Bow shock
• Box orbit
• Boyden Observatory
• Boyer-Lindquist coordinates
• BPM 37093
• Brahin (meteorite)
• Brane cosmology
• Brasilsat B1
• Brenham (meteorite)
• Brian A. Skiff
• Brian G. Marsden
• Brian P. Roman
• Brightest cluster galaxy
• Bright giant
• Bright Star Catalogue
• Brocchi's Cluster
• Bronze Star Medal
• Brown dwarf
• Brunswick star
• B-type asteroid
• Bubble Nebula (NGC 6822)
• Budha
• Bulge (astronomy)
• Bullet Cluster
• Burckle Crater
• Burroughs (crater)
• Butterfly Cluster
• Butterfly Nebula (disambiguation)
• B-V colour
• B Velorum (supergiant)
• B V star
• BY Draconis variable
• Calabash Nebula
• Calar Alto Observatory
• Calcium-aluminium-rich inclusion
• Caldwell catalogue
• Caliban (moon)
• California and Carnegie Planet Search
• California Nebula
• Callirrhoe (moon)
• Callisto (moon)
• Caloris Montes
• Calvera (neutron star)
• Calypso (moon)
• Campo Imperatore Near-Earth Objects Survey
• Campo Imperatore Near Earth Object Survey
• Cando event
• Candor Chasma
• Canes II Group
• Canes Venatici Dwarf Galaxy
• Canis Major Dwarf Galaxy
• Canonical units
• Canopus
• Canso (crater)
• Canyon Diablo (meteorite)
• Cape Verde (Mars)
• Cape York meteorite
• Cappello romano
• Captain Marvel (Marvel Comics)
• Capture orbit
• Carancas impact event
• Carbonaceous chondrite
• Carbonates on Mars
• Carbon burning process
• Carbon detonation
• Carbon dioxide in the Earth's atmosphere
• Carbon planet
• Carbon respiration
• Carbon star
• Carina Dwarf
• Carina Nebula
• Carl A. Wirtanen
• Carl Clarence Kiess
• Carl Gustav Witt
• Carlos Torres
• Carlos Ulrrico Cesco
• Carl Otto Lampland
• Carl W. Hergenrother
• Carme group
• Carme (moon)
• Carolyn S. Shoemaker
• Carpo (moon)
• Carrington rotation
• Carte du Ciel
• Cartwheel Galaxy
• Casimir Marie Gaudibert
• Cassini (Martian crater)
• Cassiopeia A
• Cassiopeia Dwarf
• Castor Moving Group
• Cataclysmic variable star
• Catalina Sky Survey
• Catalog of Components of Double and Multiple Stars
• Catalogue of Galaxies and Clusters of Galaxies
• Catalogues of Fundamental Stars
• Cat's Eye Nebula
• Causal dynamical triangulation
• Cave Nebula
• Caves of Mars Project
• Caxias (crater)
• Cayrel's Star
• Celestial coordinate system
• Celestial equator
• Celestial mechanics
• Celestial spheres
• Centaur and TNO pronunciation
• Centaur (planetoid)
• Centaurus A
• Centaurus A/M83 Group
• Centaurus Cluster
• Centaurus X-3
• Central body
• Central Fire
• Centre de recherches en géodynamique et astrométrie
• Cepheid variable
• Cerberus Fossae
• Cerberus Hemisphere
• Cerberus (Martian albedo feature)
• Ceres (dwarf planet)
• Ceres in fiction
• CERN Axion Solar Telescope
• Cerro Tololo Inter-American Observatory
• Cetus Dwarf
• CfA Redshift Survey
• Cha 110913-773444
• Chad Trujillo
• Chafe (crater)
• ChaHα8
• Chaldene (moon)
• Chandrasekhar limit
• ChaNGa
• Chang-Refsdal lens
• Chaotic Inflation theory
• Characteristic energy
• Charged black hole
• Chariot (Chinese constellation)
• Charles P. de Saint-Aignan
• Charles T. Kowal
• Charles W. Juels
• Charon (moon)
• Charon (mythology)
• Chart datum
• Chassigny (meteorite)
• Cheonsang Yeolcha Bunyajido
• Chereul 3
• Chertan
• Chiemgau impact crater
• Chinese constellations
• Chinese star maps
• Chinguetti meteorite
• Chiron (hypothetical moon)
• Chondrite
• Chondrule
• Christian Heinrich Friedrich Peters
• Christian Pollas
• Christopher Aikman
• Christopher McKay (planetary scientist)
• Chromosphere
• CH stars
• Chthonian planet
• Circinus Galaxy
• Circular orbit
• Circular polarization of starlight
• Circumpolar constellation
• Circumpolar star
• Circumstellar disk
• Cis-Neptunian object
• Ciuacoatl Mons
• CL0024+17
• CL1358+62
• Cl* 1806-20
• Claes-Ingvar Lagerkvist
• Claire Armstrong
• Classical Kuiper belt object
• Classical planets in Western alchemy
• Clearing the neighbourhood
• Climate of Mars
• Climate of Uranus
• Clovis comet
• Clutter folding
• Clutter (radar)
• Clyde Tombaugh
• CMBFAST
• C. Michelle Olmstead
• Coalsack Nebula
• Code of the Lifemaker
• CoKu Tau/4
• Cold dark matter
• Collinder catalog
• Colonization of Ceres
• Colonization of Europa
• Colonization of Mars
• Colonization of Mercury
• Colonization of the Moon
• Colonization of Titan
• Colonization of Venus
• Color-color diagram
• Columbia Hills (Mars)
• Coma Cluster
• Coma (cometary)
• Coma star cluster
• Coma Supercluster
• Comet
• Comet Arend-Roland
• Comet Bennett
• Comet de Vico
• Comet Donati
• Comet dust
• Comet Encke
• Comet Galaxy
• Comet Hale-Bopp
• Comet Humason
• Comet Hyakutake
• Comet Ikeya-Seki
• Comet IRAS-Araki-Alcock
• Comet Kohoutek
• Comet LINEAR
• Comet Machholz
• Comet McNaught
• Comet McNaught-Russell
• Comet Morehouse
• Comet nucleus
• Comet Pereyra
• Comet Pojmański
• Comet Rendezvous Asteroid Flyby
• Comet Shoemaker-Levy 9
• Comet Skjellerup-Maristany
• Comet Skorichenko-George
• Comet SWAN
• Comet West
• Comet White-Ortiz-Bolelli
• Comet Zhu-Balam
• Common envelope binary
• Comoving distance
• Compact star
• Conamara Chaos
• Cone Nebula
• Conjunction (astronomy and astrology)
• Constellation
• Contact binary
• Contributors to cosmology
• Controlled atmosphere
• Cooling flow
• Co-orbital moon
• Co-orbital satellite
• Copenhagen University Observatory
• Copernican period
• Copernican principle
• Cor Caroli
• Cordelia (moon)
• Cordell-Lorenz Observatory
• Coriolis field
• Cornelis Johannes van Houten
• Corona
• Coronal hole
• Coronal loop
• Coronal mass ejection
• Coronal seismology
• Cosmic Calendar
• Cosmic censorship hypothesis
• Cosmic distance ladder
• Cosmic dust
• Cosmic egg
• Cosmic evolution
• Cosmic gravitational wave background
• Cosmic inflation
• Cosmic infrared background
• Cosmic latte
• Cosmic microwave background experiments
• Cosmic microwave background radiation
• Cosmic neutrino background
• Cosmic ray
• Cosmic string
• Cosmic variance
• Cosmogenesis
• Cosmogony
• Cosmological constant
• Cosmological decade
• Cosmological horizon
• Cosmological perturbation theory
• Cosmological Principle
• Cosmology
• Cosmos
• Counter-Earth
• Coupling, Energetics and Dynamics of Atmospheric Regions
• Crab Nebula
• Crab Pulsar
• Crater counting
• Crescent
• Crescent Nebula
• Cressida (moon)
• CRESST (Dark Matter Search)
• Cretaceous–Tertiary extinction event
• Crewe (crater)
• Crew Exploration Vehicle
• Crimean Astrophysical Observatory
• Crivitz (crater)
• Črni Vrh Observatory
• Crucifixion eclipse
• Cryogenic Dark Matter Search
• C-type asteroid
• Culmination
• Cuno Hoffmeister
• Cupid (moon)
• Curved space
• Cuspy halo problem
• Custos Messium
• CXO J164710.2-455216
• CXOU J061705.3+222127
• Cyanometer
• Cyclic model
• Cydonia Mensae
• Cygnus A
• Cygnus Arm
• Cygnus OB2-12
• Cygnus X-1
• Cygnus X-3
• Cyg OB2-12
• Cyg OB2 -8A
• Cyllene (moon)
• Cyril V. Jackson
• Cytherean
• D/1892 T1
• Dactyl (moon)
• Dalton Minimum
• DAMA/NaI
• Dandelion Crater
• DANEOPS
• Daniel du Toit
• Danjon scale
• Dao Vallis
• Daphnis (moon)
• Darian calendar
• Dark dune spot
• Dark energy
• Dark energy star
• Dark fluid
• Dark galaxy
• Dark Horse (astronomy)
• Dark matter
• Dark matter behavior
• Dark matter halo
• Dark moon
• Dark nebula
• Dark star
• Dark star (dark matter)
• David C. Jewitt
• David D. Balam
• David Dunlap Observatory Catalogue
• David H. Levy
• David Hughes (astronomer)
• David J. Asher
• David J. Tholen
• David L. Rabinowitz
• Dawn (spacecraft)
• Day length
• DEAP
• Debris disk
• Decans
• Deceleration parameter
• December 1992 lunar eclipse
• December 2001 lunar eclipse
• December 2009 lunar eclipse
• December 2010 lunar eclipse
• December 2011 lunar eclipse
• DEEP2 Redshift Survey
• Deep Ecliptic Survey
• Deep Impact (space mission)
• Deep Lens Survey
• Definition of planet
• Degenerate matter
• Deimos (moon)
• Delaunay tessellation field estimator
• Delaware Diamond
• DeLisle Stewart
• Delta Cancrids
• Delta Scuti variable
• Delta-v
• Delta-v budget
• DEN 0255-4700
• DEN 1048-3956
• Deneb
• Deneb el Okab
• Denebola
• DENIS-P J020529.0-115925
• Dennis di Cicco
• Dennis K. Chesney
• Density contrast
• Desdemona (moon)
• Desertec
• Desert planet
• De Sitter universe
• Despina (moon)
• Detached binary
• Detached object (astronomy)
• Deucalion
• Deuteronilus Mensae
• Diamond Cross
• Diamond ring effect (solar eclipse)
• Differential rotation
• Diffuse interstellar band
• Diffuse nebula
• Diffuse sky radiation
• Digitized Sky Survey
• Dimensionless Hubble parameter
• Dinorwic (crater)
• Diogenite
• Dione (moon)
• Dipole anisotropy
• Dipper (Chinese constellation)
• Dirac large numbers hypothesis
• Directional Recoil Identification From Tracks
• DirecTV-10
• DIRECTV-5
• Disc galaxy
• Disc (galaxy)
• Discovery of cosmic microwave background radiation
• Discovery of Neptune
• Discovery of the Martian moons
• Distance measures (cosmology)
• Diurnal motion
• Dog Days
• Domain wall
• Dong Fang Hong 02
• Doppler imaging
• Dorado Group
• Dorsa Aldrovandi
• Dorsa Andrusov
• Dorsa Argand
• Dorsa Barlow
• Dorsa Burnet
• Dorsa Cato
• Dorsa Dana
• Dorsa Ewing
• Dorsa Geikie
• Dorsa Harker
• Dorsa Lister
• Dorsa Mawson
• Dorsa Rubey
• Dorsa Smirnov
• Dorsa Sorby
• Dorsa Stille
• Dorsa Tetyaev
• Dorsa Whiston
• Dorsum Arduino
• Dorsum Azara
• Dorsum Bucher
• Dorsum Buckland
• Dorsum Cayeux
• Dorsum Cloos
• Dorsum Cushman
• Dorsum Gast
• Dorsum Grabau
• Dorsum Guettard
• Dorsum Heim
• Dorsum Higazy
• Dorsum Nicol
• Dorsum Niggli
• Dorsum Oppel
• Dorsum Owen
• Dorsum Scilla
• Dorsum Termier
• Dorsum Thera
• Dorsum Von Cotta
• Dorsum Zirkel
• Double Cluster
• Double Helix Nebula
• Double planet
• Double quasar
• Double star
• Draco Dwarf
• Dragon's Egg
• Dragon Storm (astronomy)
• Dream of Scipio
• D region
• D-type asteroid
• Dumbbell Nebula
• Dunhuang map
• Durchmusterung
• Dušan Kalmančok
• Dust devil
• Dwarf elliptical galaxy
• Dwarf galaxy
• Dwarf galaxy problem
• Dwarf nova
• Dwarf planet
• Dwarf spheroidal galaxy
• Dwarf spiral galaxy
• Dwingeloo 1
• Dwingeloo 2
• Dynamical friction
• Dynamical parallax
• DY Persei variable
• Dysnomia (moon)
• Dyson's eternal intelligence
• Dyson sphere
• Eagle Nebula
• Early bombardment phase
• Early-type star
• Earth
• Earth and Moon
• Earth Impact Database
• Earthly Branches
• Earth-Moon barycenter
• Earth's atmosphere
• Earth's gravity
• Earth's orbit
• Earth's rotation
• Earth tide
• Earth Trojan asteroid
• East-Asian Planet Search Network
• Eastern Mediterranean event
• Eccentric anomaly
• Eccentricity (mathematics)
• Eccentricity vector
• Eccentric Jupiter
• Echus Chasma
• Echus Montes
• Eclipse
• Eclipse Comet of 1882
• Eclipse cycle
• Eclipsing binary
• Ecliptic
• Edmund Neville Nevill
• Édouard Jean-Marie Stephan
• EDUSAT (Satellite)
• Edward Emerson Barnard
• Edward L. G. Bowell
• Edwin Foster Coddington
• Edwin Hubble
• Effective temperature
• Egg Nebula
• Eighth Cambridge Survey
• Einstein Cross
• Einstein@Home
• Einstein radius
• Einstein ring
• Ejecta
• Ejnar Hertzsprung
• Ekpyrotic
• Elara (moon)
• El Capitan (Mars)
• Eleanor F. Helin
• Electroweak epoch
• Elephant's Trunk nebula
• Elia Millosevich
• Elizabeth Roemer
• Ella Island
• Elliptical galaxy
• Elliptic orbit
• Elongation (astronomy)
• Elysium Mons
• Elysium Planitia
• Emil Ernst
• Emission nebula
• Emma Dean (crater)
• Emptiness (Chinese constellation)
• Empyrean
• Encampment (Chinese constellation)
• Enceladus (moon)
• E Nebula
• Energia Lunar Expedition
• Eos Chasma
• Ephemeris
• Epimetheus (moon)
• Episode list of The Universe (TV series)
• Epoch (astronomy)
• EPOXI
• Equation of state (cosmology)
• Equation of the center
• Equation of time
• Equations for a falling body
• Equatorial bulge
• Equatorial coordinate system
• Equinox
• Eratosthenian
• Erebus (crater)
• Ergosphere
• Eric Walter Elst
• Eridania Lake
• Erinome (moon)
• Eris (dwarf planet)
• Eris (mythology)
• Ernest Leonard Johnson
• Ernst Wilhelm Leberecht Tempel
• Erriapus (moon)
• Escape orbit
• Escape velocity
• Eskimo Nebula
• ESO 269-57
• ESO 510-G13
• Esperanto symbols
• Esquel (meteorite)
• Eta Aquariids
• Eta Carinids
• E-type asteroid
• Euanthe (moon)
• Eucrite
• Eugène Joseph Delporte
• Eugene Merle Shoemaker
• Eukelade (moon)
• Euler's three-body problem
• Eunomia family
• Euporie (moon)
• Eurobird 1
• Europa (moon)
• Europa Orbiter
• European Combined Geodetic Network
• European Gravitational Observatory
• European Mars Analog Research Station
• European Space Information System
• Eurydome (moon)
• Evection
• Evershed effect
• Evolution of water on Mars and Earth
• Exoplanetology
• Exosphere
• Exotic matter
• Exotic star
• Exploration of Jupiter
• Exploration of Mars
• Exploration of Neptune
• Exploration of Saturn
• Exploration of the Moon
• Exploration of Uranus
• Exploration Systems Architecture Study
• Extended Groth Strip
• Extended Net (Chinese constellation)
• Extragalactic Distance Scale
• Extrasolar moon
• Extrasolar planet
• Extraterrestrial atmospheres
• Extraterrestrial cyclone
• Extraterrestrial liquid water
• Extraterrestrial materials
• Extraterrestrial real estate
• Extraterrestrial skies
• Extremal black hole
• Eyes Galaxies
• EZ CMa
• Faber-Jackson relation
• Facula
• Faint blue galaxy
• Faint young sun paradox
• Fallen Astronaut
• Falling (physics)
• False vacuum
• Farbauti (moon)
• Far side of the Moon
• Fast Low-Ionization Emission Region
• Features on Phobos and Deimos
• February 1989 lunar eclipse
• February 1990 lunar eclipse
• February 2008 lunar eclipse
• February 2009 lunar eclipse
• Félix Aguilar Observatory
• Fenrir (moon)
• Ferdinand (moon)
• Fermi glow
• Fernand Courty
• Fernand Rigaux
• Fg (physics)
• Fiasco (novel)
• Field aligned irregularities
• Field galaxy
• Fifth Cambridge Survey of Radio Sources
• Fifth planet (hypothetical)
• Final anthropic principle
• Fingers of God
• First Cambridge Catalogue of Radio Sources
• First contact (astronomy)
• Five Chariots
• Five-pointed star
• Five star
• Flag of Mars
• Flame Nebula
• Flamsteed designation
• Flare star
• Flashback (video game)
• Flashline Mars Arctic Research Station
• Flatness problem
• Flattening
• Flexiverse
• Flight on Titan
• Flora family
• Flyby anomaly
• Flying serpent (asterism)
• Foe (unit of energy)
• Follow the Drinkin' Gourd
• Fomalhaut
• Forbush decrease
• Formation and evolution of the Solar System
• Former constellations
• Fornax Cluster
• Fornax Dwarf
• Fornjot (moon)
• Fossil group
• Four star
• Four Symbols (Chinese constellation)
• Fourth Cambridge Survey
• Fox Fur Nebula
• Fractal cosmology
• Fra Mauro formation
• Fram (crater)
• Frame-dragging
• Francesco Manca
• Francesco Maria Grimaldi
• Francisco (moon)
• François Arago
• François Gonnessiat
• Frank B. Zoltowski
• Frank Elmore Ross
• Franz Kaiser
• Frederici Honores
• Frédéric Sy
• Fred Lawrence Whipple
• Free-air anomaly
• Free drift
• Free-fall
• Free-fall time
• Freimut Börngen
• Friedrich Karl Arnold Schwassmann
• Friedrich Tietjen
• Frosty Leo Nebula
• FSC15307+3253
• F-type asteroid
• Fukang (meteorite)
• Full moon
• Full moon cycle
• Fundamental plane (elliptical galaxies)
• Fusor (astronomy)
• Future of an expanding universe
• Fuzzball (string theory)
• F V star
• G117-B15A
• G29-38
• Gabriele Cattani
• Gaea trilogy
• Gal (acceleration)
• Galactic anticenter
• Galactic astronomy
• Galactic Center
• Galactic coordinate system
• Galactic corona
• Galactic cosmic ray
• Galactic halo
• Galactic tide
• Galactic year
• Galactocentric distance
• Galactocentrism
• Galatea (moon)
• Galaxy
• Galaxy 17
• Galaxy 18
• Galaxy 19
• Galaxy 23
• Galaxy 25
• Galaxy 26
• Galaxy 27
• Galaxy 28
• Galaxy 3C
• Galaxy 4R
• Galaxy AGN classification
• Galaxy cloud
• Galaxy color-magnitude diagram
• Galaxy filament
• Galaxy formation and evolution
• Galaxy groups and clusters
• Galaxy IV
• Galaxy merger
• Galaxy morphological classification
• Gale (crater)
• Galilean moons
• Galileo (spacecraft)
• Galle (Martian crater)
• Gamma Cassiopeiae variable
• Gamma Cephei Ab
• Gamma Doradus variable
• Gamma ray burst
• Gamma ray burst emission mechanisms
• Gamma ray burst progenitors
• Ganesa Macula
• Ganges Chasma
• Ganymede (moon)
• Gao-Guenie
• Gary Hug
• Gas giant
• Gate orbit
• Gauss' law for gravity
• GCIRS 13E
• GCRT J1745-3009
• GD 358
• GD 362
• GD 66
• Gefion family
• Gegenschein
• Geminga
• Geminids
• General Catalogue of Nebulae and Clusters
• General Catalogue of Variable Stars
• Genesis Rock
• Genesis (spacecraft)
• Geneva Extrasolar Planet Search
• GEO 600
• Geocentric model
• Geocentric orbit
• Geocorona
• Geography of Mars
• Geoid
• Geological features of the solar system
• Geologic Calendar
• Geology of Mars
• Geology of Mercury
• Geology of the Moon
• Geology of Venus
• Geophysical MASINT
• Geopotential
• George Henry Peters
• George Mary Searle
• George Van Biesbroeck
• Geostationary Operational Environmental Satellite
• Geostationary orbit
• Geostationary ring
• Geostationary transfer orbit
• Geosynchronous orbit
• Gerard Kuiper
• Germano D'Abramo
• G-force
• Ghost (Chinese constellation)
• Giacobinids
• Gianluca Masi
• Giant diffuse galaxy
• Giant impact hypothesis
• Giant star
• Gibeon (meteorite)
• Gienah
• Gilbert (Martian crater)
• Giotto mission
• Giovanni Battista Riccioli
• Giovanni de Sanctis
• Giovanni Domenico Cassini
• Giovanni Schiaparelli
• Girl (Chinese constellation)
• Giuseppe Piazzi
• Glass with embedded metal and sulfides
• Glitch (astronomy)
• Global Atmosphere Watch
• Global Oscillations Network Group
• Globular cluster
• Globus Aerostaticus
• Glowworm (astronomy)
• Gnevyshev-Ohl rule
• Goethe Link Observatory
• Goldar
• Gomez's Hamburger
• Google Earth
• Google Lunar X Prize
• Google Moon
• Gordon J. Garradd
• Gorizont
• Gould Belt
• Gould Belt Survey
• Graham E. Bell
• Grand design spiral galaxy
• Grand unification epoch
• Grand unification theory
• Granule (solar physics)
• Graphical timeline from Big Bang to Heat Death
• Graphical timeline of our universe
• Graphical timeline of the Big Bang
• Graphical timeline of the Stelliferous Era
• Gravastar
• Graveyard orbit
• Gravimeter
• Gravimetry
• Gravitation
• Gravitational acceleration
• Gravitational binding energy
• Gravitational biology
• Gravitational collapse
• Gravitational constant
• Gravitational coupling constant
• Gravitational field
• Gravitational interaction of antimatter
• Gravitational keyhole
• Gravitational lens
• Gravitational lensing formalism
• Gravitational microlensing
• Gravitational mirage
• Gravitational redshift
• Gravitational shielding
• Gravitational time dilation
• Gravitational two-body problem
• Gravitational wave
• Gravitational wave background
• Gravitational wave detector
• Gravitational well
• Gravitation (astronomy)
• Gravitation of the Moon
• Gravitomagnetism
• Gravitometer
• Gravity anomaly
• Gravity assist
• Gravity darkening
• Gravity drag
• Gravity Field and Steady-State Ocean Circulation Explorer
• Gravity Recovery and Climate Experiment
• Gravity Research Foundation
• Gravity turn
• GRB 050509b
• GRB 050904
• GRB 060218
• GRB 060614
• GRB 070125
• GRB 080319B
• GRB 990123
• Great Attractor
• Great chain of being
• Great Comet
• Great Comet of 1577
• Great Comet of 1729
• Great Comet of 1843
• Great Comet of 1882
• Great Dark Spot
• Great Diamond
• Great January comet of 1910
• Great Observatories Origins Deep Survey
• Great Wall (astronomy)
• Great White Spot
• Greek astronomy
• Greenhouse effect
• Green Valley (Mars)
• Gregory Benford
• Gregory Scott Aldering
• Greip (moon)
• Grigory Abramovich Shajn
• Grigory Neujmin
• Grissom Hill
• GRO J1655-40
• Groombridge 1618
• Groombridge 1830
• Groombridge 34
• Ground track
• GRS 1124-683
• GRS 1915+105
• GSC 02652-01324
• G. Thomson
• G-type asteroid
• Guabonito
• Guest star (astronomy)
• Guide Star Catalog
• Guide Star Catalog II
• Guillaume Bigourdan
• Gullstrand-Painlevé coordinates
• Gum Nebula
• G V star
• GW 123.4-1.5
• György Kulin
• Gyula M. Szabó
• Gyula Szabó
• HabCat
• Hadley Rille meteorite
• Hadron epoch
• Haedi
• Hairy Head (Chinese constellation)
• Hale (Martian crater)
• Halimede (moon)
• Halley's Comet
• Halo Occupation Distribution
• Halo orbit
• Hamburg/ESO Survey
• Hans-Emil Schuster
• Hansteen (crater)
• Hapkeite
• Hardwar
• Harmonices Mundi
• Harpalyke (moon)
• Harry Edwin Wood
• Hartle-Hawking state
• Harvest moon
• Hati (moon)
• HATNet Project
• HAT-P-5
• HAT-P-6
• Haughton-Mars Project
• Haute-Provence Observatory
• Hawking radiation
• Hayabusa
• Hayashi limit
• Hayashi track
• HCG 87
• H chondrite
• HCM-6A
• HDE 268835
• HE0107-5240
• HE 0437-5439
• HE0450-2958
• HE1327-2326
• HE 1523-0901
• Head of tide
• Heart (Chinese constellation)
• Heart Nebula
• Heat death of the universe
• Heat Shield Rock
• Heavenly Market enclosure
• Heber Doust Curtis
• Hebes Chasma
• Hecates Tholus
• HED meteorite
• Hegemone (moon)
• Heikki A. Alikoski
• Heimdal (Martian crater)
• Heinlein (crater)
• Heinrich Louis d'Arrest
• Heinrich Wilhelm Matthäus Olbers
• Helene (moon)
• Helike (moon)
• Heliocentric orbit
• Heliocentrism
• Heliometer
• Helion (meteoroid)
• Helioseismography
• Helioseismology
• Heliosphere
• Heliospheric current sheet
• Helios probes
• Heliosynchronous orbit
• Helium flash
• Helium Focusing Cone
• Helix Nebula
• Hellas-Sat
• Hendrik van Gent
• Henri Debehogne
• Henri Joseph Anastase Perrotin
• Henry Draper Catalogue
• Henry E. Holt
• Henry L. Giclas
• Henyey track
• Herbig Ae/Be stars
• Herbig-Haro object
• Hercules Cluster
• Hercules X-1
• Hermann Mayer Salomon Goldschmidt
• Herman Potočnik
• Hermippe (moon)
• Herschel 400 Catalogue
• Herschel (crater on Mimas)
• Herschel (Martian crater)
• Hertzsprung gap
• Hertzsprung-Russell diagram
• Hesperus
• Hess diagram
• Hexahedrite
• HH 34
• Hickson Compact Group
• High Earth orbit
• High-G training
• Highly Elliptical Orbit
• High-mass X-ray binary
• High Possil meteorite
• H II region
• Hill sphere
• Himalia group
• Himalia (moon)
• Hinode
• HIP 14810
• HIP 67593
• HIPASS
• Hipparcos Catalogue
• Hirayama families
• H I region
• HiRISE
• Hiroki Kosai
• Hiroshi Abe (astronomer)
• Hiroshi Araki
• Hiroshi Kaneda
• Hiroshi Mori (astronomer)
• Hispasat
• History of Solar System formation and evolution hypotheses
• History of supernova observation
• History of the Big Bang theory
• History of the constellations
• Hitoshi Shiozawa
• HL Tau 76
• Hoag's Object
• Hoba meteorite
• Hodge 301
• Hodges meteorite
• Hohmann transfer orbit
• Holden (Martian crater)
• Holger Thiele
• Holmberg IX
• Holocene Impact Working Group
• Holographic principle
• Homestead (meteorite)
• Homunculus Nebula
• Horace Parnell Tuttle
• Horizon
• Horizon problem
• Horizontal branch
• Horizontal coordinate system
• Horizontal Falls
• Horn Antenna
• Horn (Chinese constellation)
• Horologium Cluster
• Horologium Supercluster
• Horse and Rider
• Horsehead Nebula
• Horseshoe orbit
• Host galaxy
• Hot Bird
• Hot dark matter
• Hot Jupiter
• Hourglass Nebula
• Howardite
• Hubble Deep Field
• Hubble Guide Star Catalog - Astrographic Catalog/Tycho
• Hubble sequence
• Hubble's law
• Hubble volume
• Huchra's Lens
• Huckitta
• Hugh Percy Wilkins
• Hungaria family
• Hunter's moon
• Husband Hill
• Huya
• Huygens (crater)
• Huygens probe
• HVC 127-41-330
• Hyades (star cluster)
• Hydra-Centaurus Supercluster
• Hydra Cluster
• Hydra (moon)
• Hydrogen line
• Hygiea family
• Hypanis Vallis
• Hyperbolic trajectory
• Hypergiant
• Hyperion (moon)
• Hypernova
• Hypervelocity star
• Hypotheses non fingo
• Hyrrokkin (moon)
• Iani Chaos
• Iapetus (moon)
• Ice dwarf
• Icy moon
• IIE iron meteorite
• Ijiraq (moon)
• I.M.Chisov
• Imilac
• Immirzi parameter
• Impact crater
• Impact event
• Impact gardening
• Impactite
• Impact structure
• Impact winter
• Imperial Earth
• Improper motion
• Inclination
• Inclined orbit
• Index Catalogue
• Index Catalogue of Visual Double Stars
• Indiana Asteroid Program
• Inertial frame of reference
• Inertial space
• Inex
• Inferior and superior planets
• Inflationary epoch
• Inflaton
• Infrared cirrus
• Infrared window
• Ingrid van Houten-Groeneveld
• Inhomogeneous cosmology
• Initial mass function
• Inner moon
• Inner satellites of Jupiter
• In-situ resource utilization
• Instability strip
• Intelsat 11
• Intelsat 14
• Intelsat 16
• Intelsat 1R
• Intelsat 2
• Intelsat 3R
• Intelsat 8
• Intelsat 9
• Intelsat I
• Interacting binary star
• Interacting galaxy
• Interferometric gravitational wave detector
• Intergalactic space
• Intermediate circular orbit
• Intermediate-mass black hole
• Intermediate-mass X-ray binary
• Intermediate polar
• Intermediate spiral galaxy
• Internal structure of the Moon
• International Cometary Explorer
• International Lunar Network
• International Near-Earth Asteroid Survey
• International Standard Atmosphere
• Interplanetary dust cloud
• Interplanetary medium
• Interplanetary Transport Network
• Interstellar cloud
• Interstellar medium
• Interstellar reddening
• Intracluster medium
• Intrinsic redshift
• Introduction to general relativity
• Introduction to M-theory
• Invariable plane
• Iocaste (moon)
• IOK-1
• Io (moon)
• Ionization cone
• Ionosphere
• Ionospheric absorption
• Ionospheric storm
• IRAS
• IRC +10216
• Iridium
• Iris nebula
• Iron meteorite
• Irregular galaxy
• Irregular moon
• Irregular variable
• Isidis Planitia
• Isonoe (moon)
• Ixion
• I Zwicky 18
• J002E3
• J0806
• Jacchia Reference Atmosphere
• Jack Sound
• Jacobi integral
• James Craig Watson
• James Edward Keeler
• James E. Faller
• James Ferguson (astronomer)
• James M. Roe
• James Whitney Young
• Jana Tichá
• Jane Luu
• January 2000 lunar eclipse
• January 2001 lunar eclipse
• Janus (moon)
• Japan Spaceguard Association
• Jarnsaxa (moon)
• Jaume Nomen
• JCSAT-9
• Jean Chacornac
• Jean-Claude Merlin
• Jean Mueller
• Jeff T. Alu
• Jérôme Eugène Coggia
• Jet Propulsion Laboratory Developmental Ephemeris
• Jewel Box
• Jezero (crater)
• J. Lawrence Smith Medal
• Joanny-Philippe Lagrula
• Joel Hastings Metcalf
• Johannes Hevelius
• Johann Friedrich Julius Schmidt
• Johann Gottfried Galle
• Johann Heinrich von Mädler
• Johann Hieronymus Schröter
• Johann Holetschek
• Johann Nepomuk Krieger
• Johann Palisa
• John Broughton
• John Couch Adams
• John Russell Hind
• John Russell (painter)
• John V. McClusky
• Josep Comas Solà
• Joseph Helffrich
• Jovian Europa Orbiter
• Joy's Law
• JSC Moon Base
• J-type asteroid
• Juan Hartmann
• Jules Alfred Pierrot Deseilligny
• Julian day
• Juliane Köpcke
• Juliet (moon)
• July 2000 lunar eclipse
• July 2001 lunar eclipse
• July 2009 lunar eclipse
• Jun Chen
• June 2002 lunar eclipse
• June 2010 lunar eclipse
• June 2011 lunar eclipse
• June Bootids
• Juno clump
• Juno (spacecraft)
• Jupiter
• Jupiter-crosser asteroid
• Jupiter mass
• Jupiter (mythology)
• Jupiter's moons in fiction
• Juventae Chasma
• Juxta Crucem
• Kaidun meteorite
• Kale (moon)
• Kallichore (moon)
• Kaluza–Klein theory
• Kalyke (moon)
• Kamacite
• Kaoru Ikeya
• Kapteyn's Star
• Kara crater
• Kari (moon)
• Karin family
• Karl Augustesen
• Karl Ludwig Harding
• Karl Ludwig Hencke
• Karl Theodor Robert Luther
• Karl Wilhelm Reinmuth
• Kármán line
• Karoonda meteorite
• Kaspar Gottfried Schweizer
• Katzman Automatic Imaging Telescope
• KazSat
• Kazuo Kubokawa
• Kazuro Watanabe
• Keeling Curve
• Kemble's Cascade
• Kenneth J. Lawrence
• Kenzo Suzuki (astronomer)
• Kepler (Martian crater)
• Kepler orbit
• Kepler's laws of planetary motion
• Kerr metric
• Ketu (mythology)
• Keun Nan Mun
• Kiichiro Hurukawa
• Kin Endate
• King tide
• Kiviuq (moon)
• Klemperer rosette
• Kleť Observatory
• Koga (crater)
• Kōichirō Tomita
• Korado Korlević
• Kordylewski cloud
• Kore (moon)
• Koronis family
• Koyo Kawanishi
• Kozai mechanism
• Krasnojarsk (meteorite)
• KREEP
• Kreutz Sungrazers
• Krisztián Sárneczky
• Kruger 60
• Krzeminski's Star
• K–T boundary
• Kṛttikā
• K-type asteroid
• Kugelblitz (astrophysics)
• Kuiper belt
• K V star
• KW Sagitarii
• L1014
• L1157
• L 675-81
• Labes
• Lacaille 8760
• Lacaille 9352
• Lacus Doloris
• Lacus Gaudii
• Lacus Hiemalis
• Lacus Lenitatis
• Lacus Luxuriae
• Lacus Oblivionis
• Lacus Odii
• Lacus Timoris
• Lacus Veris
• Ladislav Brožek
• Lagoon Nebula
• Lagrangian point
• L'Aigle (meteorite)
• Lalande 21185
• Lalande 21185d
• Lambda-CDM model
• Laomedeia (moon)
• Laplace limit
• Laplace-Runge-Lenz vector
• Large Magellanic Cloud
• Large Synoptic Survey Telescope
• Large Underground Xenon experiment
• Larissa (moon)
• Larry's Lookout
• Laser accelerometer
• Laser Interferometer Space Antenna
• La Silla Observatory
• Last Chance (Mars)
• La Superba
• Late Heavy Bombardment
• Late-type star
• LBQS 1429-008
• LBV 1806-20
• LCGT
• L chondrite
• Leda (moon)
• Legs (Chinese constellation)
• LEK Lunar Expeditionary Complex
• Leland E. Cunningham
• Lenka Kotková
• Lenticular galaxy
• Leo A
• Leo Anton Karl de Ball
• Leo Cluster
• Leo I (dwarf galaxy)
• Leo II (dwarf galaxy)
• Leonard L. Amburgey
• Leonard Medal
• Leonids
• Leo Triplet
• Leptogenesis (physics)
• Lepton epoch
• Lernaean Hydra
• Levitation
• LGM-1
• LH54-425
• LH 95
• LHA 120-N 157B
• LHS 288
• LHS 292
• Libration
• Life on Mars
• Light curve
• Light Dark Matter
• Lighter than air
• Lightest Supersymmetric Particle
• LIGO
• Liisi Oterma
• Lilith (hypothetical moon)
• Limb darkening
• Lincoln Near-Earth Asteroid Research
• Linus (moon)
• Lipót Schulhof
• Liquid air
• Lissajous orbit
• List of 16th century lunar eclipses
• List of 17th century lunar eclipses
• List of 18th century lunar eclipses
• List of 19th century lunar eclipses
• List of 20th century lunar eclipses
• List of 21st century lunar eclipses
• List of 22nd century lunar eclipses
• List of 23rd century lunar eclipses
• List of 24th century lunar eclipses
• List of 25th century lunar eclipses
• List of Abell clusters
• List of Apollo missions
• List of Arabic star names
• List of artificial objects on the Moon
• List of artificial objects on Venus
• List of asteroid-discovering observatories
• List of asteroid moons
• List of asteroids
• List of asteroids discovered by Carolyn Shoemaker
• List of asteroids discovered by Nikolai Stepanovich Chernykh
• List of asteroids named after people
• List of asteroids named after places
• List of astronomical catalogues
• List of basic astronomy topics
• List of brightest stars
• List of brown dwarfs
• List of comets
• List of constellations
• List of constellations by area
• List of craters on 253 Mathilde
• List of craters on Europa
• List of craters on Proteus
• List of craters on Puck
• List of craters on Umbriel
• List of cubewanos
• List of current and future lunar missions
• List of dark nebulae
• List of diffuse nebulae
• List of extrasolar planet extremes
• List of extraterrestrial volcanoes
• List of features on the Moon
• List of galaxies
• List of galaxy clusters
• List of geological features on 243 Ida and Dactyl
• List of geological features on 25143 Itokawa
• List of geological features on 433 Eros
• List of geological features on 951 Gaspra
• List of geological features on Ariel
• List of geological features on Europa
• List of geological features on Miranda
• List of geological features on Oberon
• List of geological features on Titania
• List of geological features on Triton
• List of globular clusters
• List of hypothetical planetary objects
• List of impact craters on Earth
• List of largest known stars
• List of least massive stars
• List of lineae on Europa
• List of lists of small solar system bodies
• List of lunar eclipses in saros series 121
• List of lunar meteorites
• List of Martian canals
• List of Mercury-crossing asteroids
• List of Messier objects
• List of meteor showers
• List of moons
• List of moons by diameter
• List of most luminous stars
• List of most massive stars
• List of named Amor asteroids
• List of named asteroids (A-C)
• List of named asteroids (D-E)
• List of named asteroids (F-H)
• List of named asteroids (I-K)
• List of named asteroids (L-N)
• List of named asteroids (O-R)
• List of named asteroids (S-V)
• List of named asteroids (W-Z)
• List of named Solar System objects
• List of names for the Milky Way
• List of Near-Earth asteroids by distance from Sun
• List of nearest bright stars
• List of nearest galaxies
• List of nearest stars
• List of NGC objects
• List of NGC objects (1000-1999)
• List of NGC objects (1-999)
• List of NGC objects (2000-2999)
• List of NGC objects (3000-3999)
• List of NGC objects (4000-4999)
• List of NGC objects (5000-5999)
• List of NGC objects (6000-6999)
• List of NGC objects (7000-7840)
• List of non-periodic comets
• List of notable asteroids
• List of numbered Aten asteroids
• List of objects at Lagrangian points
• List of orbits
• List of periodic comets
• List of planetary bodies
• List of planetary nebulae
• List of plutoid candidates
• List of polar-ring galaxies
• List of protoplanetary nebulae
• List of quadrangles on Europa
• List of quadrangles on the Moon
• List of quasars
• List of Saros series for lunar eclipses
• List of semiregular variable stars
• List of solar cycles
• List of solar eclipses in antiquity
• List of solar eclipses in the 20th century
• List of solar eclipses in the 21st century
• List of solar eclipses seen from China
• List of solar eclipses visible from the United Kingdom 1000 - 2090 AD
• List of Solar System objects
• List of Solar System objects by mass
• List of Solar System objects by radius
• List of Solar System objects by surface gravity
• List of spiral galaxies
• List of star names
• List of stars in the Hipparcos Catalogue
• List of stars of Hyades
• List of Stars of Hyades
• List of stars with confirmed extrasolar planets
• List of stars with proplyds
• List of supernova remnants
• List of symbolic stars
• List of the brightest KBOs
• List of traditional star names
• List of trans-Neptunian objects
• List of Trojan asteroids (Greek camp)
• List of Trojan asteroids (Trojan camp)
• List of unconfirmed exoplanets
• List of variable stars
• List of X-ray pulsars
• Lists of astronomical objects
• Lists of stars
• Lists of stars by constellation
• Little Dumbbell Nebula
• Little Ghost Nebula
• Living With a Star
• LK Lander
• Llanesco (crater)
• LL chondrite
• Local Bubble
• Local Group
• Local Interstellar Cloud
• Lochium Funis
• Lodestar
• Loge (moon)
• Lomonosov (Martian crater)
• Longitude of the ascending node
• Longitude of the periapsis
• Long period variable
• Lonsdaleite
• Loop I Bubble
• Loop II Bubble
• Loop III Bubble
• Loren C. Ball
• Louis Boyer (astronomer)
• Low Earth orbit
• Lowell Observatory Near-Earth-Object Search
• Low energy transfers
• Lower Imbrian
• Low-g condition
• Low-ionization nuclear emission-line region
• Low-mass X-ray binary
• Low surface brightness galaxy
• LP 944-020
• LS 5039
• LS I +61 303
• L-type asteroid
• Lubber fiend
• Luboš Kohoutek
• Luciano Tesi
• Lucien LaCoste
• Luigi Carnera
• Luminosity function (astronomy)
• Luminous blue variable
• Luminous infrared galaxy
• Luminous red nova
• Lunar Architecture (NASA)
• Lunar ark
• Lunar Atmosphere and Dust Environment Explorer
• Lunar conjunction
• Lunar day
• Lunar distance (astronomy)
• Lunar distance (navigation)
• Lunar dome
• Lunar eclipse
• Lunar Explorers Society
• Lunar geologic timescale
• Lunar government
• Lunar ice
• Lunar Laser Ranging Experiment
• Lunar limb
• Lunar magma ocean
• Lunar mare
• Lunar mass
• Lunar meteorite
• Lunar node
• Lunar orbit
• Lunar Orbit Insertion
• Lunar outpost (NASA)
• Lunar phase
• Lunar precession
• Lunar Precursor Robotic Program
• Lunar Receiving Laboratory
• Lunar Reconnaissance Orbiter
• Lunar rover
• Lunar soil
• Lunar sortie
• Lunar space elevator
• Lunar standstill
• Lunar surface
• Lunar terminator
• Lunar terrane
• Lunar theory
• Lunation Number
• Lunex Project
• Lunitidal interval
• Lunokhod 1
• Lunokhod 2
• Lunokhod programme
• Lute of Pythagoras
• Lutz D. Schmadel
• Luyten 726-8
• Luyten's Star
• Lyman-alpha blob
• Lyman alpha emitter
• Lyman-alpha forest
• Lynds 1616
• Lynx Arc
• Lyons Groups of Galaxies
• Lyrids
• Lysithea (moon)
• Lyudmila Chernykh
• Lyudmila Karachkina
• Lyudmila Zhuravlyova
• M101 Group
• M109 Group
• M1-92
• M51 Group
• M74 Group
• M81 Group
• M82 X-1
• M94 Group
• M96 Group
• Ma'adim Vallis
• Maat Mons
• Mab (moon)
• Machina Electrica
• MACHO-1997-BLG-41
• MACHO-98-BLG-35
• MACHO-LMC-5
• Mach principle
• Mach's principle
• Mädler (Martian crater)
• Maffei 1
• Maffei 2
• Magellanic Bridge
• Magellanic Clouds
• Magellanic Stream
• Magha (nakshatra)
• Magic star
• Magnetar
• Magnetic cloud
• Magnetic field of celestial bodies
• Magnetic field of the Moon
• Magnetic reconnection
• Magnetospheric eternally collapsing object
• Magnitude of eclipse
• Magumba
• Main-belt comet
• Main sequence
• Main sequence star
• Makemake (dwarf planet)
• Makemake (mythology)
• Makio Akiyama
• Mamers Vallis
• Mandora (crater)
• Mangala
• Mangala Valles
• Mangere Lagoon
• Manicouagan crater
• Manned mission to Mars
• March 1997 lunar eclipse
• March 2006 lunar eclipse
• March 2007 lunar eclipse
• Marco Cavagna
• Marc W. Buie
• Mare Anguis
• Mare Australe
• Mare Cognitum
• Mare Crisium
• Mare Erythraeum
• Mare Humorum
• Mare Ingenii
• Marek Wolf
• Mare Moscoviense
• Mare Spumans
• Marfak
• Margaret (moon)
• Margaritifer Terra
• Marian star
• Mario Jurić
• Mark Abraham
• Markarian 421
• Markarian's Chain
• Mark Armstrong
• Mars
• Mars Analogue Research Station Programme
• Mars-crosser asteroid
• Mars Desert Research Station
• MarsDrive
• Mars for Less
• Mars General Circulation Model
• Mars hoax
• Mars landing
• Mars meteorite
• Mars Piloted Orbital Station
• Mars rover
• Mars Simulation Project
• Mars Society
• Mars Society Australia
• Martian
• Martian canal
• Martian spherules
• Martian spiders
• Mary Adela Blagg
• Masahiro Koishikawa
• Masakatsu Aoki
• Masanori Hirasawa
• Masanori Matsuyama
• Masaru Arai
• Masaru Inoue
• Masaru Mukai
• Masayuki Iwamoto
• Masayuki Yanai
• Massalia family
• Mass concentration
• Mass distribution
• Massive compact halo object
• Mass ratio
• Mass to light ratio
• Matsuo Sugano
• Matter power spectrum
• Maunder Minimum
• Maura Tombelli
• Mawrth Vallis
• Maxwell Montes
• Max Wolf
• May 2002 lunar eclipse
• May 2003 lunar eclipse
• May 2004 lunar eclipse
• Mayall II
• Mayall's Object
• McCool Hill
• McDonald Observatory
• MCELS (Magellanic Cloud Emission-line Survey)
• McNeil's Nebula
• Mean anomaly
• Mean longitude
• Mean motion
• MEASAT
• Medium Earth Orbit
• Medusa Fossae
• Medusa Nebula
• Megaclite (moon)
• Megamaser
• Melas Chasma
• Mellish (crater)
• Membrane paradigm
• Memnonia (Mars)
• Mendel (Martian crater)
• Mercury in fiction
• Mercury-manganese star
• Mercury (planet)
• Mercury's moon
• Mesopause
• Mesoplanet
• Mesosiderite
• Mesosphere
• Messier marathon
• Messier object
• Metallicity
• Meteor burst communications
• Meteor Crater
• Meteorite
• Meteorite classification
• Meteorite fall
• Meteorite fall statistics
• Meteoritical Society
• Meteoritical Society's Service Award
• Meteoritics
• Meteoritics & Planetary Science
• Meteoroid
• Meteor shower
• Meteosat
• Meteosat Second Generation
• Methods of detecting extrasolar planets
• Methone (moon)
• Metis (moon)
• Metric expansion of space
• Mice Galaxies
• Michael E. Brown
• Michigan Mars Rover Team
• Micro black hole
• Microgravity environment
• Microgravity University
• Microlensing Observations in Astrophysics
• Micrometeoroid
• Microquasar
• Microturbulence
• Miguel Itzigsohn
• Mihira
• Milan Antal
• Milky Way
• Milky Way (mythology)
• Milky Way's satellite galaxies
• Millennium Run
• Millisecond pulsar
• Milorad B. Protić
• Miloš Tichý
• Mimas (moon)
• Mineo (meteorite)
• Mineral dust
• MiniGrail
• Minor planet
• Minoru Kizawa
• Mira
• Mira B
• Miranda (moon)
• Mira variable
• Mirror matter
• M. Laugier
• Mneme (moon)
• Model spectrum
• Modern Maximum
• Moissanite
• Moldavite
• Molecular cloud
• Molniya orbit
• Monoceros Ring
• Mons Agnes
• Mons Ardeshir
• Mons Argaeus
• Mons Blanc
• Mons Gruithuisen Gamma
• Mons Hansteen
• Mons Maenalus
• Mons Maraldi
• Mons Penck
• Mons Rümker
• Mons Vitruvius
• Monte Agliale Supernovae and Asteroid Survey
• Monte Milone (meteorite)
• Montes Archimedes
• Montes Secchi
• Month
• Moon
• Moon illusion
• Moon landing
• Moonlet
• Moonlight
• Moonquake
• Moon rock
• Moonscape
• Moon Society
• Moons of Jupiter
• Moons of Mars
• Moons of Neptune
• Moons of Pluto
• Moons of Saturn
• Moons of Uranus
• Moreton wave
• Moritz Ludwig George Wichmann
• Moving group
• MRC 1138-262
• Mrigashīrsha
• MS 0735.6+7421
• MS 1512 +36-cB58
• M-theory
• M-type asteroid
• Muggletonianism
• Multiple histories
• Multiple star
• Multiverse
• Mundilfari (moon)
• Murchison meteorite
• Mursili's eclipse
• Musca Borealis
• Muscida
• Musica universalis
• Myth of Er
• My Very Exciting Magic Carpet Just Sailed Under Nine Palace Elephants
• Mz 1
• Mz 3
• N 180B
• N1 rocket
• Naiad (moon)
• Naked-eye planet
• Naked singularity
• Nakhla meteorite
• Nakshatra
• Name conflicts of Solar System objects
• Naming of moons
• Naoto Sato
• Narvi (moon)
• National Atmospheric Release Advisory Center
• National Geographic Society - Palomar Observatory Sky Survey
• Naturaliste (crater)
• Natural satellite
• Navarro-Frenk-White profile
• Navigational stars
• N-body problem
• N-body simulation
• Nearby Stars Database
• Nearby Supernova Factory
• Near Earth Asteroid Tracking
• Near earth object
• Near-Earth object
• Near equatorial orbit
• Near-extremal black hole
• Near side of the Moon
• Nebula
• Nebulae in fiction
• Nebular contraction
• Nebular hypothesis
• Neck (Chinese constellation)
• Nectarian
• Neith (hypothetical moon)
• NEODyS
• Neon burning process
• Neptune
• Neptune-crosser asteroid
• Neptune in fiction
• Neptune Trojan
• Nereid (moon)
• Nereidum Montes
• Neso (moon)
• Net (Chinese constellation)
• Neumann line
• Neutralino
• Neutrino
• Neutron star
• Neutron-star oscillations
• Neutron star spin-up
• Neutron Star (story)
• Neutron Tide
• New General Catalogue
• New moon
• Newtonian gauge
• Newton (Martian crater)
• Newton's law of universal gravitation
• New Worlds Mission
• NGC 7331 Group
• Nhill (crater)
• Nicholson (Martian crater)
• Nicolas Alkemade
• Nier Prize
• Niger Vallis
• Nikolai Stepanovich Chernykh
• Nilesat 101
• Nilesat 102
• Nili Fossae
• Nilo Syrtis
• Nine Views
• Nininger Meteorite Award
• Ninth Cambridge survey at 15GHz
• Nix (moon)
• Noachis Terra
• Nobuhiro Kawasato
• Noctis Labyrinthus
• Noctua
• No hair theorem
• Non-Gaussianity
• Non-inclined orbit
• Nonsingular black hole models
• Non-standard cosmology
• Nordtvedt effect
• Normaal Amsterdams Peil
• Norma Cluster
• Normalforcelessness
• Normal star
• Norman G. Thomas
• Norman Robert Pogson
• North America Nebula
• Northern Local Supervoid
• North Polar Basin (Mars)
• North Star
• Norton County (meteorite)
• Norton's Star Atlas
• Nova
• Nova remnant
• Novaya Zemlya effect
• November 1993 lunar eclipse
• November 2002 lunar eclipse
• November 2003 lunar eclipse
• NRAO VLA Sky Survey
• NRLMSISE-00
• NSS-6
• NSS-7
• Numerical model of solar system
• Nyx
• Oak Ridge Observatory
• Oberon (moon)
• Oberth effect
• Observable universe
• Observational cosmology
• Observations and explorations of Venus
• Observing the Moon
• OB star
• OCA-DLR Asteroid Survey
• Ocean colonization
• Ocean planet
• Octahedrite
• October 2004 lunar eclipse
• October 2005 lunar eclipse
• Odd number theorem
• Odette Bancilhon
• Odysseus (crater)
• Odyssey Moon
• Officina Typographica
• OGLE-2003-BLG-235/MOA-2003-BLG-53
• OH masers
• OJ 287
• Okuro Oikawa
• Olbers' paradox
• Old Woman meteorite
• Olympia Undae
• Olympus Mons
• Omega Nebula
• Omega Point
• Omicron Centaurids
• Omniverse
• Onepoto (volcanic crater)
• One star
• Oort cloud
• Oort Limit
• Open cluster
• Open cluster family
• Open cluster remnant
• Oph 162225-240515
• Ophelia (moon)
• Opposition effect
• Optical black hole
• Optical Gravitational Lensing Experiment
• Optical pulsar
• Optus fleet of satellites
• Orbit
• Orbital decay
• Orbital eccentricity
• Orbital elements
• Orbital inclination change
• Orbital maneuver
• Orbital mechanics
• Orbital motion
• Orbital node
• Orbital period
• Orbital perturbation
• Orbital plane (astronomy)
• Orbital pole
• Orbital resonance
• Orbital speed
• Orbital state vectors
• Orbital station-keeping
• Orbit determination
• Orbit equation
• Orbit@home
• Orbiting body
• Orbit of the Moon
• Orbit phasing
• Orcus (mythology)
• Ordinary chondrite
• Orgueil (meteorite)
• Orion Arm
• Orionids
• Orion Molecular Cloud Complex
• Orion Nebula
• Orion (spacecraft)
• Orion's Sword
• Orion variable
• Orlando A. Naranjo
• Orrery
• Orthosie (moon)
• Osamu Muramatsu
• Oscillatory universe
• Osculating orbit
• Oskar Lesser
• Osservatorio San Vittore
• OTELO
• OTS 44
• Otto Struve
• O-type asteroid
• Ourique (meteorite)
• Outer space
• Outflow channels
• Overcontact binary
• O V star
• OVV quasar
• Owl Nebula
• Ox (Chinese constellation)
• Oxygen burning process
• Ozone layer
• P/2007 R5
• Paaliaq (moon)
• Pablo Cottenot
• Pair-instability supernova
• Pallas family
• Pallasite
• Pallasovka (meteorite)
• Pallene (moon)
• Palomar 1
• Palomar 12
• Palomar 4
• Palomar 5
• Palomar Sky Survey
• Palus Putredinis
• Pamela M. Kilmartin
• Pancake dome
• Pandora (moon)
• Pan (moon)
• Pan-STARRS
• Paolo Chiavenna
• Parabolic trajectory
• Paragould meteorite
• Parker spiral
• Park Forest (meteorite)
• Parking orbit
• Particle horizon
• Particle physics in cosmology
• PAS 1
• Pascal Lee
• Paschal Full Moon
• Pasiphaë group
• Pasiphaë (moon)
• Pasithee (moon)
• Patched Conics
• Path-constrained rendezvous
• Paul G. Comba
• Paul Götz
• Paul Henry and Prosper Henry
• Paulo R. Holvorcem
• Paul Pellas-Graham Ryder Award
• Paul Wild (Swiss astronomer)
• Pavlovka (meteorite)
• Pavo-Indus Supercluster
• Pavonis Mons
• Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics
• Payload fraction
• Peak of Eternal Light
• Peculiar galaxy
• Peculiar star
• Peekskill meteorite
• Pegasus Dwarf Irregular Galaxy
• Pegasus Dwarf Spheroidal Galaxy
• Pelageya Shajn
• Pelican Nebula
• Pendulum rocket fallacy
• Penrose process
• Pentad (Greek philosophy)
• Pentagram
• Percival Lowell
• Perdita (moon)
• Perfect Cosmological Principle
• Perifocal coordinate system
• Perigalacticon
• Perigean Spring Tides
• Permian–Triassic extinction event
• Perseids
• Perseus Arm
• Perseus Cluster
• Perseus molecular cloud
• Perseus-Pisces Supercluster
• Perth Observatory
• Perturbation (astronomy)
• Petar Đurković
• Peter Kušnirák
• Petit-Prince (moon)
• Petr Pravec
• PG 1159 star
• Phaeton (hypothetical planet)
• Phantom energy
• Phase angle (astronomy)
• Phases of Venus
• Philibert Jacques Melotte
• Philip Herbert Cowell
• Philipp Johann Heinrich Fauth
• Phobos and Deimos in fiction
• Phobos (moon)
• Phobos program
• Phoebe (moon)
• Phoenicids
• Phoenix Dwarf
• Photodissociation region
• Photoevaporation
• Photometric standard stars
• Photon diffusion damping
• Photon epoch
• Photon sphere
• Photosphere
• Physical cosmology
• Physical geodesy
• Picard horn
• PICARD (spacecraft)
• PICASSO (dark matter)
• Pierangelo Ghezzi
• Piero Sicoli
• Pierre Antonini
• Pingualuit crater
• Pinwheel Galaxy
• Pinwheel nebula
• Pioneer 6, 7, 8 and 9
• Pioneer anomaly
• Pioneer Star
• Pipe Nebula
• Pi Puppids
• Pisces Dwarf
• PISMIS
• Pismis 24-1
• Pistol Nebula
• Pistol Star
• Plage (astronomy)
• Planar deformation features
• Planck epoch
• Planck particle
• Planck scale
• Planemo
• Plane of reference
• Planet
• Planetar (astronomy)
• Planetary core
• Planetary migration
• Planetary nebula
• Planetary nebula luminosity function
• Planetary Nebula M2-9
• Planetary nomenclature
• Planetary Observer program
• Planetary ring
• Planetary-size comparison
• Planetary system
• Planet-Crossing Asteroid Survey
• Planetesimal
• PlanetQuest
• Planet Quest
• Planet-satellite system
• Planets beyond Neptune
• Planetshine
• Planets in astrology
• Planet V
• Planisphere
• Plaskett's star
• Plasma cosmology
• Plasmasphere
• Pleiades
• Plessite
• Plinio Antolini
• Plutino
• Pluto
• Plutoed
• Plutoid
• Pluto in fiction
• Poeticon astronomicon
• Polar (cataclysmic variable)
• Polaris
• Polar jet
• Polar orbit
• Polar-ring galaxy
• Polar wind
• Pole star
• Polophylax
• Polydeuces (moon)
• Population III star
• Population II star
• Population I star
• Porkchop plot
• Pororoca
• Portal:Astronomy
• Portal:Mars
• Portal:Solar System
• Porter (Martian crater)
• Porth (crater)
• Portia (moon)
• Potential energy
• Potentially hazardous asteroid
• Potentiometric surface
• Pot of Gold (Mars)
• POX 186
• Poynting-Robertson effect
• PPM Star Catalogue
• Praxidike (moon)
• Pre-main sequence star
• Pre-Nectarian
• Preon star
• Presolar grains
• Priestley (lunar crater)
• Primordial black hole
• Primordial fluctuations
• Primordial isocurvature baryon model
• Primum Mobile
• Primum movens
• Principal Galaxies Catalogue
• Probing Lensing Anomalies Network
• Procyon
• Project Boreas
• Project Constellation
• Project Horizon
• Promethei Terra
• Prometheus (moon)
• Promontorium Laplace
• Pronunciation of asteroid names
• Propellant mass fraction
• Proper motion
• Proper orbital elements
• Prospero (moon)
• Proteus (moon)
• Protogalaxy
• Protoplanet
• Protoplanetary disk
• Protoplanetary nebula
• Protostar
• Provisional designation in astronomy
• Przybylski's star
• Psalterium Georgii
• Psamathe (moon)
• PSR B0329+54
• PSR B0329+54A
• PSR B0329+54B
• PSR B0950+08
• PSR B1257+12
• PSR B1257+12 A
• PSR B1257+12 B
• PSR B1257+12 C
• PSR B1257+12 D
• PSR B1259-63
• PSR B1620-26
• PSR B1828-10
• PSR B1828-10A
• PSR B1828-10B
• PSR B1828-10C
• PSR B1829-10
• PSR B1829-10A
• PSR B1913+16
• PSR B1919+21
• PSR J0537-6910
• PSR J0737-3039
• PSR J0855-4644
• PSR J1748-2446ad
• PSR J1903+0327
• PSR J1951+1123
• PSR J2144-3933
• P-type asteroid
• Puck (moon)
• Puffy planet
• Pulsar
• Pulsar kicks
• Pulsar planet
• Pulsar wind nebula
• Pulsating white dwarf
• Pultusk (meteorite)
• Punarvasu
• Puppis A
• Purple Forbidden enclosure
• Purple Mountain Observatory
• Pushya
• PVLAS
• Pwyll (crater)
• Pyrrhotite
• Q0906+6930
• Qidong (meteorite)
• QSO B0038+328
• QSO B0040+517
• QSO B0104+321
• QSO B0109+492
• QSO B0210+860
• QSO B0220+427
• QSO B0307+169
• QSO B0316+413
• QSO B0410+110
• QSO B0605+480
• QSO B0651+542
• QSO B0702+749
• QSO B0903+16
• QSO B0917+458
• QSO B0936+361
• QSO B0958+290
• QSO B1003+351
• QSO B1030+585
• QSO B1100+773
• QSO B1203+645
• QSO B1319+428
• QSO B1336+391
• QSO B1359+154
• QSO B1409+524
• QSO B1419+419
• QSO B1441+5214
• QSO B1522+546
• QSO B1637+826
• QSO B1939+605
• QSO B2121+248
• QSO B2153+377
• QSO B2229+390
• QSO B2243+394
• QSO J0842+1835
• Q star
• Q-type asteroid
• Quadrans Muralis
• Quadrantids
• Quadrupole
• Quake (natural phenomenon)
• Quantum cosmology
• Quantum gravity epoch
• Quaoar (mythology)
• Quark epoch
• Quark-nova
• Quark star
• Quasar
• Quasar J1819+3845
• Quasi-satellite
• Quasistar
• Quiescent prominence
• Quintessence (physics)
• Quintuplet cluster
• Q Velorum (dwarf star)
• R136
• R136b
• R 66 and R 126
• Radiant (meteor shower)
• Radiation-Dominated Era
• Radiation pressure
• Radiation zone
• Radio galaxy
• Radio halo
• Radio-quiet neutron star
• Radio relics
• Radio star
• Rafael Pacheco
• Rahu
• Rainbow-1
• Rampart crater
• Ramus Pomifer
• Rance tidal power plant
• Randall-Sundrum model
• Raymond Smith Dugan
• R Coronae Borealis variable
• RCW103
• RCW Catalogue
• RD1
• Red clump
• Red dwarf
• Red giant
• Red Rectangle Nebula
• Redshift
• Redshift quantization
• Redshift survey
• Red Spider Nebula
• Red Square Nebula
• Red star
• Red supergiant
• Reflection nebula
• Regulus
• Reiki Kushida
• Reiner Gamma
• Reionization
• Reissner-Nordström metric
• Relative angular momentum
• Relaxation time
• Relic particles
• Remus (moon)
• Repulsive force (astronomy)
• Resonant trans-Neptunian object
• Retrograde and direct motion
• Reull Vallis
• Reuven Ramaty High Energy Solar Spectroscopic Imager
• Reverberation mapping
• Revised New General Catalogue
• Rhadamanthus
• Rhea (moon)
• Richard D. Lines
• Richard Martin West
• Richard P. Binzel
• Rigel
• Rille
• Rima Ariadaeus
• Rimae Aristarchus
• Rimae Fresnel
• Rimae Sirsalis
• Ring galaxy
• Ring Nebula
• Ring Nebula (NGC 6822)
• Ring singularity
• Rings of Jupiter
• Rings of Neptune
• Rings of Rhea
• Rings of Saturn
• Rings of Uranus
• Rip current
• Robert Burnham, Jr.
• Robert Evans (astronomer)
• Robert G. Harrington
• Robert H. McNaught
• Robert's Quartet
• Robert Weber (astronomer)
• Robert Zubrin
• Robotic exploration of the Moon
• Robur Carolinum
• Robust Associations of Massive Baryonic Objects
• Roche limit
• Roche lobe
• Roger Putnam
• Rogue planet
• Rohini (nakshatra)
• Rome Observatory
• Romulus (moon)
• Rooftop (Chinese constellation)
• Room (Chinese constellation)
• Root (Chinese constellation)
• Rosalind (moon)
• Rosetta (orbit)
• Rosetta (spacecraft)
• Rosetta space probe timeline
• Rosette Nebula
• Ross 128
• Ross 154
• Ross 248
• Ross 548
• Ross 614
• Rossiter-McLaughlin effect
• Rotating black hole
• Rotating ellipsoidal variable
• Rotating radio transient
• Rotating reference frame
• Rotation around a fixed axis
• Rotation period
• Rotation-powered pulsar
• Route-dependence
• Royal Harwood Frost
• Royal Observatory, Edinburgh
• Royal stars
• Roy A. Tucker
• Rp-process
• RR Lyrae variable
• RS Canum Venaticorum variable
• R. Scott Dunbar
• R-type asteroid
• Rucbah
• Rudolphine Tables
• Rudolph Minkowski
• Rule of twelfths
• Runaway star
• Rupes Altai
• Rupes Cauchy
• Rupes Kelvin
• Rupes Recta
• RV Tauri variable
• RX J0822-4300
• RX J0852.0-4622
• RXJ1242-11
• RX J1416.5+2315
• RX J1856.5-3754
• S/2000 (1998 WW31) 1
• S/2000 J 11
• S/2003 J 10
• S/2003 J 12
• S/2003 J 15
• S/2003 J 16
• S/2003 J 17
• S/2003 J 18
• S/2003 J 19
• S/2003 J 2
• S/2003 J 23
• S/2003 J 3
• S/2003 J 4
• S/2003 J 5
• S/2003 J 9
• S/2004 S 12
• S/2004 S 13
• S/2004 S 17
• S/2004 S 3
• S/2004 S 4
• S/2004 S 6
• S/2004 S 7
• S/2006 S 1
• S/2006 S 3
• S/2007 S 2
• S/2007 S 3
• S4 Index
• Sachs-Wolfe effect
• Sadao Sei
• Sagittarius A
• Sagittarius A*
• Sagittarius Arm
• Sagittarius B2
• Sagittarius Dwarf Elliptical Galaxy
• Sagittarius Dwarf Irregular Galaxy
• Sagittarius Star Cloud
• Sagittarius Window Eclipsing Extrasolar Planet Search
• Sakigake
• Sakurai's Object
• Samuel Oschin telescope
• Sanduleak -69° 202a
• Santa Lucia Stroncone Astronomical Observatory
• Sao (moon)
• Sapas Mons
• Saros cycle
• Satellite galaxy
• Satoru Otomo
• Saturn
• Saturn-crosser asteroid
• Saturn kilometric radiation
• Saturn Nebula
• Saturn's Gallic group of satellites
• Saturn's Inuit group of satellites
• Saturn's moons in fiction
• Saturn's Norse group of satellites
• Sawiskera (moon)
• SAX J1808.4-3658
• Sayh al Uhaymir 169
• Scalar Field Dark Matter
• Scalar-vector-tensor decomposition
• Scale factor (Universe)
• Scale height
• Scalloped margin dome
• Scattered disc
• Sceptrum Brandenburgicum
• Sceptrum et Manus Iustitiae
• Schelte J. Bus
• Schiaparelli (Martian crater)
• Schreibersite
• Schwarzschild metric
• Schwarzschild radius
• S. Cofre
• Scorpius-Centaurus Association
• Scorpius X-1
• Scott J. Horowitz
• SCR 1845-6357
• SCUBA-2 All Sky Survey
• Sculptor Dwarf Galaxy
• Sculptor Dwarf Irregular Galaxy
• Sculptor Galaxy
• Sculptor Group
• Scutum-Crux Arm
• SDP4
• SDSS J090745.0+024507
• SDSSJ0946+1006
• Seasonal lag
• Second Cambridge Catalogue of Radio Sources
• Secular resonance
• Secular variations of the planetary orbits
• Sedna (mythology)
• Segin
• Seidai Miyasaka
• Seiji Ueda
• Selenographia, sive Lunae descriptio
• Selenographic coordinates
• Selenography
• Self-creation cosmology
• Self-Indication Assumption
• Self-interacting dark matter
• Semidetached binary
• Semi-major axis
• Semi-minor axis
• Semiregular variable star
• Semi-synchronous orbit
• Sentry (monitoring system)
• September 1996 lunar eclipse
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• Sergei Belyavsky
• Serpens south
• Service star
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• Seven star
• Seventh Cambridge Survey
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• Seyfert galaxy
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• Shani
• Shape of the Universe
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• Skathi (moon)
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• Sky
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• Smith's Cloud
• Smithsonian Astrophysical Observatory Star Catalog
• SN 1006
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• SN 1572
• SN 1604
• SN 185
• SN 1901B
• SN 1914A
• SN 1959E
• SN 1960R
• SN 1975A
• SN 1979C
• SN 1986G
• SN 1987A
• SN 1990U
• SN 1992bd
• SN 1993J
• SN 1994D
• SN 1998bw
• SN 1998S
• SN 1999ec
• SN 1999eu
• SN 2003B
• SN 2003fg
• SN 2003gd
• SN 2003H
• SN 2004dj
• SN 2004gt
• SN 2005ap
• SN 2005B
• SN 2005bc
• SN 2005cs
• SN 2005df
• SN 2006F
• SN 2006gy
• SN 2006jc
• SN 2006X
• SN 2007sr
• SN 2007uy
• SN 2008ax
• SN 2008D
• Snake Nebula
• Sneden's Star
• Snowflake Cluster
• SNR G292.0+01.8
• Sodium layer
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• SOFA (Astronomy)
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• Solar analog
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• Solar eclipse of April 8, 2024
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• Solar eclipses in fiction
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• Srīpur (crater)
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• SSSPM J1013-1356
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• SSTGFLS J222557+601148
• Stability of the Solar System
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• Štefan Gajdoš
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• Stephano (moon)
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• STEREO
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• Storm moon
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• String cosmology
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• Struve 1341
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• Sun
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• Sura Ionospheric Heating Facility
• Surface gravity
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• Surtur (moon)
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• Suttungr (moon)
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• Sweden Solar System
• SWEEPS-04
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• Swift (Deimian crater)
• SWIFT J1756.9-2508
• Swiss cheese features
• SX Arietis variable
• Sycorax (moon)
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• Sylvain Julien Victor Arend
• Symbiotic variable star
• Synchronous coordinates
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• Systemic (amateur extrasolar planet search project)
• Syzygy
• Table of lunar phases
• Table of stars with Bayer designations
• Table of the largest objects in the Solar System
• Tables of Toledo
• Tadpole Galaxy
• Taenite
• Tagish Lake (meteorite)
• Tail (Chinese constellation)
• Tai Sui
• Takao Kobayashi
• Takeshi Urata
• Takuo Kojima
• Talitha
• TAMA 300
• Tamara Mikhaylovna Smirnova (astronomer)
• Tank Farm
• Tanzil
• Tarandus vel Rangifer
• Tarantula Nebula
• Tarqeq (moon)
• Tarvos (moon)
• Tau Philius
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• Taygete (moon)
• Technical atmosphere
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• Telescope Array Project
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• Telesto (moon)
• Tele-X
• TELKOM-2
• Tellurion
• Telstar 10
• Telstar 301
• Tempe Terra
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• Ten-star household
• Terby (crater)
• Terebellum (astronomy)
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• Terra Cimmeria
• Terraforming of Mars
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• Terra Nivium
• Terra Sabaea
• Terra Sirenum
• Terrestrial gamma-ray flash
• Terrestrial planet
• Terzan 7
• Tests of general relativity
• Tethys (moon)
• Tetsuo Kagawa
• Tetsuya Fujii
• Tetsuyasu Mitani
• Thackeray's Globules
• Thaicom 4
• Thalassa (moon)
• Thanos
• Thanoseid
• Tharsis Montes
• Thebe (moon)
• The Bitches
• The British and Irish Meteorite Society
• The Dust of Death
• The Game-Players of Titan
• The Great Daylight 1972 Fireball
• The Hole Man
• Theia (planet)
• The Invisible Enemy
• The Journeyman Project 3: Legacy of Time
• Thelxinoe (moon)
• Themis (hypothetical moon)
• Themisto (moon)
• Theodor Brorsen
• The Puppet Masters
• Thermal and Evolved Gas Analyzer
• Thermodynamics of the universe
• Thermopause
• Thermosphere
• The Sirens of Titan
• The Spaceguard Foundation
• The Sun in human culture
• Theta¹ Orionis C
• The Three Kings
• The World at the End of Time
• Thierry Pauwels
• Thira (crater)
• Third Cambridge Catalogue of Radio Sources
• Thomas Gwyn Elger
• Thorne-Hawking-Preskill bet
• Thorne-Żytkow object
• Three enclosures
• Three star
• Three Stars (Chinese constellation)
• Thrymr (moon)
• Thuban
• Thwing
• Thyone (moon)
• Tidal acceleration
• Tidal atlas
• Tidal bore
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• Tidal resonance
• Tidal river
• Tidal stripping
• Tidal tensor
• Tide
• Tideline
• Tide pool
• Tide table
• Timaeus (dialogue)
• Timekeeping on Mars
• Timeline of black hole physics
• Timeline of cosmology
• Timeline of discovery of Solar System planets and their moons
• Timeline of gravitational physics and relativity
• Timeline of the Big Bang
• Timeline of white dwarfs, neutron stars, and supernovae
• Timing noise
• Timothy B. Spahr
• Tip of the Red Giant Branch
• Tirawa (crater)
• Tired light
• Tisserand's Criterion
• Tisserand's parameter
• Titan (book)
• Titan Empire
• Titania (moon)
• Titan in fiction
• Titan (John Varley)
• Titan (Marvel Comics)
• Titan (moon)
• Titius–Bode law
• Tobias Mayer
• Tollmann's hypothetical bolide
• Tolman surface brightness test
• Tom Gehrels
• Tomimaru Okuni
• Tom Stafford (astronomer)
• Topography of the Moon
• Toshimasa Furuta
• Toshiro Nomura
• Total electron content
• TRACE
• Tracy's Rock
• Traditional Star Names
• Tranquility Base
• Trans-Atlantic Exoplanet Survey
• Trans Earth Injection
• Transient lunar phenomenon
• Transition Comets — UV Search for OH Emissions in Asteroids
• Transit of Deimos from Mars
• Transit of Earth from Jupiter
• Transit of Earth from Mars
• Transit of Earth from Neptune
• Transit of Earth from Saturn
• Transit of Earth from Uranus
• Transit of Jupiter from outer planets
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• Transit of Mars from Neptune
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• Transit of Mercury
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• Transit of Mercury from Saturn
• Transit of Mercury from Uranus
• Transit of Mercury from Venus
• Transit of minor planets
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• Transit of Venus
• Transit of Venus, 2004
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• Transit of Venus from Jupiter
• Transit of Venus from Mars
• Transit of Venus from Saturn
• Transit of Venus from Uranus
• Trans Lunar Injection
• Trans-Neptunian object
• Trans-Planckian problem
• Transposition, docking, and extraction
• Trapezium Cluster
• Trapped null surface
• TrES-1
• TrES-2
• TrES-3
• TrES-4
• Triangulum Galaxy
• Triangulum Minus
• Trifid Nebula
• Trinculo (moon)
• Triton (moon)
• Tritos
• Trojan (astronomy)
• Trojan moon
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• Tropopause
• Troposphere
• True anomaly
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• Tsiolkovsky rocket equation
• Tsuneo Niijima
• Tsutomu Hioki
• Tsutomu Seki
• T Tauri star
• T Tauri wind
• T-type asteroid
• Tucana Dwarf
• Tugaske (crater)
• Tully-Fisher relation
• Tundra orbit
• Tunguska event
• Turbopause
• Turdus Solitarius
• Turtle Beak (Chinese constellation)
• Turtles all the way down
• TVLM513-46546
• Twenty-eight mansions
• TW Hydrae association
• Twin Quasar
• Two-body problem
• Two star
• Tycho-2 Catalogue
• Tycho Brahe (crater)
• Tycho G
• Tychonic system
• Type Ia supernova
• Type Ib and Ic supernovae
• Type II supernova
• Tyrrhena Terra
• UAO-DLR Asteroid Survey
• UESAC
• UGC 11066
• UGC 8091
• UGCA 86
• UK Dark Matter Collaboration
• UKIRT Infrared Deep Sky Survey
• Ulisse Munari
• Ulrika Babiaková
• Ultimate fate of the universe
• Ultimi Scopuli
• Ultraluminous X-ray source
• Ultra-short-period planets
• Ulysses (spacecraft)
• Umbriel (moon)
• Unbarred lenticular galaxy
• Unbarred spiral galaxy
• Universe
• University Rover Challenge
• Upper Imbrian
• Uppsala-DLR Trojan Survey
• Uppsala General Catalogue
• Upsilon Andromedae d
• Upsilon Andromedae e
• Uranometria
• Uranus
• Uranus-crosser asteroid
• Uranus in fiction
• Urbain Le Verrier
• Ursa Major Cluster
• Ursa Major Dwarf
• Ursa Major I Dwarf
• Ursa Major II Dwarf
• Ursa Major Moving Group
• Ursa Minor (disambiguation)
• Ursa Minor Dwarf
• Ursids
• UScoCTIO 108
• User:Asimsky/European Combined Geodetic Network
• User:Brian enke99/bio
• User:Markpipe/DRIFT
• User:Pfhreak/Solar Twin
• User:Warwick-cfsa
• U.S. Standard Atmosphere
• Uttara Ashādhā
• Uttara Bhādrapadā
• Uzboi Vallis
• V337 Car
• Vallis Alpes
• Vallis Baade
• Vallis Bohr
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• Valter Giuliani
• Van Biesbroeck 8
• Van Biesbroeck 8b
• Van Maanen's star
• Variable nebula
• Variable star
• Variable star designation
• Variation (astronomy)
• Varuna
• Vastitas Borealis
• Vega
• Vega 1
• Vega 2
• Vega program
• Veil Nebula
• Vela Pulsar
• Vela Supernova Remnant
• Vela X-1
• Venetia Phair
• Venus
• Venus-crosser asteroid
• Venusians
• Venus in fiction
• Vermilion Bird
• Verona Rupes
• Vertical deflection
• Vesna Vulović
• Vesta family
• Viktor Knorre
• Vincenzo Cerulli
• Vincenzo Silvano Casulli
• Vincenzo Zappalà
• Violeta G. Ivanova
• Virginids
• Virgle
• Virgo-centric flow
• Virgo Cluster
• VIRGOHI21
• Virgo interferometer
• Virgo Stellar Stream
• Virgo Supercluster
• Virrat (crater)
• Virtual black hole
• Vishniac (crater)
• Vision for Space Exploration
• Višnjan Observatory
• Visual binary
• Vis-viva equation
• Vitim event
• VizieR
• Vladimir Aleksandrovich Albitzky
• Vladimir Shkodrov
• Vogt-Russell theorem
• Volcanism on Io
• Von Zeipel theorem
• Vostok (crater)
• Voyager program
• V-type asteroid
• Vulcan (hypothetical planet)
• Vulcanoid asteroid
• W43A
• W49B
• W50 (nebula)
• Wall (Chinese constellation)
• Walter Baade
• Walter Goodacre
• Walter R. Cooney, Jr.
• Walther Augustin Villiger
• Warm dark matter
• Warren B. Offutt
• Washington Double Star Catalog
• WASP-1
• WASP-12
• WASP-2
• WASP-4
• WASP-8
• Watari Kakei
• WD 0137-349
• WD 0346+246
• WD B1620-26
• Weak gravitational lensing
• Weakly interacting massive particles
• Weber bar
• Weightlessness
• Well (Chinese constellation)
• Wen Yen Jen
• Westerlund 1
• Westerlund 2
• Wet moon
• Weyl curvature hypothesis
• Weyl's postulate
• Whirlpool Galaxy
• White dwarf
• White hole
• White Tiger (Chinese constellation)
• Wide-field Infrared Survey Explorer
• Widmanstätten pattern
• Wikipedia:WikiProject Astronomical objects/Infoboxes
• Wikipedia:WikiProject Astronomical objects/Infoboxes galaxies
• Wild Duck Cluster
• Wilhelm Beer
• Wilhelm Gotthelf Lohrmann
• Wilhelm Julius Foerster
• Wilkes Land crater
• Willamette Meteorite
• William A. Bradfield
• William Herschel
• William Kwong Yu Yeung
• William Lassell
• Willman 1
• Willow (Chinese constellation)
• Wilson effect
• WIND
• Wings (Chinese constellation)
• Winnecke 4
• Winnecke Catalogue of Double Stars
• Winnowing Basket (Chinese constellation)
• Winter Hexagon
• Wise Observatory
• WMAP cold spot
• Wold Newton meteorite
• Wolf 1061
• Wolf 359
• Wolf 424
• Wolf 635
• Wolf Bickel
• Wolf-Lundmark-Melotte
• Wolf moon
• Wolf number
• Wolf-Rayet nebula
• Wolf-Rayet star
• World
• World (adjective)
• Wormhole
• WR 102ka
• WR 104
• WR 136
• Wrinkle-ridge
• Wunda (crater)
• W Ursae Majoris variable
• W Virginis variable
• X/1106 C1
• Xallarap
• Xanthe Terra
• XENON Dark Matter Search Experiment
• Xifengite
• Xinglong Station (NAOC)
• XMMXCS 2215-1738
• XO-1
• XO-5
• X-ray binary
• X-ray burster
• X-ray pulsar
• XTE J1650-500
• XTE J1739-285
• X-type asteroid
• Yamato 791197
• Yarkovsky effect
• Yarkovsky-O'Keefe-Radzievskii-Paddack effect
• Yasukazu Ikari
• Yellow hypergiant
• Yellow supergiant
• Ylem
• Ymir (moon)
• Yohkoh
• Yoshiaki Banno
• Yoshiaki Oshima
• Yoshikane Mizuno
• Yoshio Kushida
• Yoshisada Shimizu
• Younger Dryas impact event
• Young stellar object
• Yrjö Väisälä
• Yuji Hyakutake
• Yuty (crater)
• Zdeněk Moravec
• Zdeňka Vávrová
• Zenithal Hourly Rate
• Zenith Hourly Rate
• Zero-velocity surface
• Zhang Jiaxiang
• Zhang Yuzhe
• Zij-i-Sultani
• Zodiac
• Zodiacal constellation
• Zodiacal light
• Zond 1964A
• Zond 1967A
• Zond 1967B
• Zone of Avoidance
• Zubenhakrabi
• ZW II 96