List of astronomical topics
This page aims to list articles on Wikipedia that are related to
Astronomy,
Astrophysics and
Cosmology. This is so that those interested in the subject can monitor changes to the pages by clicking on
Related changes in the sidebar.
The list is not necessarily complete or up to date - if you see an article that should be here but isn't (or one that shouldn't be here but is), please do update the page accordingly.
Three astronomy related WikiProjects are being developed, please visit WikiProject Astronomical Objects, WikiProject Constellations, and WikiProject Telescopes.
\n
0-9
1 Ceres --\n
2 Pallas --\n3C9 --\n3C48 --\n3C191 --\n
3C273 --\n
3 Juno --\n
4 Vesta --\n10 Hygeia --\n14 Herculi --\n
15 Eunomia --\n16 Cygni --\n
16 Psyche --\n
21 Lutetia --\n
24 Themis --\n
31 Euphrosyne --\n34 Tauri --\n
45 Eugenia --\n47 Ursae Majoris --\n
48 Doris --\n
51 Pegasi --\n
52 Europa --\n55 Cancri --\n
61 Cygni --\n
61 Cygni A --\n
61 Cygni B --\n
65 Cybele --\n
70 Virginis --\n
71 Niobe --\n87 Silvia --\n
90 Antiope --\n
92 Undina --\n
94 Aurora --\n
95 Arethusa --\n
106 Dione --\n110 Lidia --\n
154 Bertha --\n221 Eos --\n
243 Ida --\n
253 Mathilde --\n324 Bamberga --\n
433 Eros --\n451 Patientia --\n
511 Davida --\n
588 Achilles --\n
624 Hektor --\n674 Rachele --\n
704 Interamnia --\n
944 Hidalgo --\n
951 Gaspra --\n
1221 Amor --\n
1566 Icarus --\n
1620 Geographos --\n1685 Toro --\n
1862 Apollo --\n
2004 AS1 --\n
2060 Chiron --\n
2062 Aten --\n
3001 Michelangelo --\n
3018 Godiva --\n
3200 Phaethon --\n
3753 Cruithne --\n
3834 Zappafrank --\n
4179 Toutatis --\n4544 Xanthus --\n
4593 Reipurth --\n
4769 Castalia --\n
5145 Pholus -- \n5261 Eureka --\n5381 Sekhmet --\n
5535 Annefrank --\n7066 Nessus --\n
11169 Alkon --\n
18610 Arthurdent --\n
28978 Ixion --
A
A New Theory of Magnetic Storms --\n
A-type asteroid --\n
Aaronson, Marc --\n
Abdulmelik, Chalid Ben --\n
Abell, George Ogden --\n
Abell 1835 IR1916 --\nAbell 2142 --\n
Aberration in optical systems --\n
Aberration of light --\nAbsolute date --\n
Absolute magnitude --\n
Absorption line --\n
Accelerating universe --\n
Acceleration --\n
Accretion disk --\n
Achernar --\nAchondrites --\n
Achromatic lens --\n
Achromatic doublet --\n
Acrux --\n
Active Galactic Nuclei --\n
Active galaxy --\n
Active optics --\n
Adams, John Couch --\n
Adaptive optics --\nAdara --\n
Adelard of Bath --\nAdhara --\n
Adler Planetarium --\n
Adrastea --\n
Aether theory --\n
Afterglow --\n
Age of the Earth --\n
Age of the Universe --\nAirglow --\n
Airy disc --\n
Airy, George --\n
Aitken, Robert --\n
Al-Batani --\n
Albategnius --\n
Albedo --\n
Albireo --\n
Alcor --\n
Aldebaran --\n
Aldhelm, Bishop of Sherborne --\n
d'Alembert, Jean le Rond --\nAlfonsine tables --\n
Alfonso X of Castile --\n
Alfvén, Hannes Olof Gösta --\nAlfven universe --\nAlgieba --\n
Algol --\n
ALH84001 --\n
Alioth --\nAlkaid --\n
Al-Khwarizmi --\nAllegheny Observatory --\nAlmach --\n
Almagest --\n
Alnilam --\nAlnitak --\n
Alniyat --\n
Alpha Centauri --\n
Alpha Centauri B --\n
Alpha particle --\nAlpha Persei --\n
Alpha process --\nAlpher-Bethe-Gamow theory --\n
Alpheratz --\nAlphonsine tables --\n
Al Sufi --\n
Al Sufi, 'Abd Al-Rahman --\n
Altair --\nAltazimuth mount --\n
Altitude --\n
Aludra --\nAlura --\n
Amalthea (moon) --\n
Amateur astronomy --\n
Amateur telescope making --\n
American Astronomical Society --\nAmerican Nebula --\n
Amor asteroid --\n
Amort, Eusebius --\n
Amplitude --\n
Ananke (moon) --\n
Analemma --\n
Anaximander --\n
Andromeda --\n
Andromeda (constellation) --\n
Andromeda Galaxy --\n
Andronicus of Cyrrhus --\n
Angle --\n
Angular diameter --\nAngular diameter distance --\n
Angular frequency --\n
Angular measurement --\n
Angular momentum --\n
Angular resolution --\n
Angular velocity --\n
Anomalistic month --\n
Anomalistic year --\nAnomalous cosmic ray --\n
Anomalous phenomenon --\nAnomalous X-ray pulsar --\nAnomaly (astronomy) --\n
Anorthosite --\n
Antares --\n
Antarctic Circle --\n
Anthropic principle --\n
Antlia --\n
Antikythera mechanism --\nApastron --\n
Apennine Mountains --\n
Aperture --\nAperature synthesis --\n
Apoapsis --\n
Apollo asteroid --\n
Apparent magnitude --\n
Apparent motion --\n
Apparent solar day --\n
Apsides --\n
Apus --\n
Aquarius --\n
Aquila --\n
Ara --\n
Arago, Dominique --\n
Arago, François Jean Dominique --\n
Aratus --\n
Archaeoastronomy --\n
Arcminute --\n
Arcsecond --\n
Arctic Circle --\n
Arcturus --\n
Area --\n
Arecibo Observatory --\n
Arecibo radio telescope --\n
Argo Navis --\n
Ariel --\n
Aries --\n
Aristarchus --\n
Aristotle --\n
Arjuna --\n
Armillary sphere --\n
Arp, Halton --\n
Arrhenius, Svante --\n
Artemova, Ioulia Vladimirovna --\n
Asteroid --\n
Asteroid belt --\n
Asteroid deflection strategies --\n
Asteroid moon --\n
Asteroseismology --\n
Astigmatism --\n
Aston, Francis William --\n
Astrobiology --\nAstrochemistry --\n
Astrolabe --\n
Astrologer --\n
Astrology --\n
Astrometric binary --\n
Astrometry --\n
Astronaut --\n
Astronautics --\n
Astronomer --\n
Astronomer Royal --\n
Astronomical aberration --\n
Astronomical body --\n
Astronomical conjunction --\n
Astronomical distance --\n
Astronomical Journal --\n
Astronomical Julian calendar --\n
Astronomical object --\n
Astronomical objects named after people --\nAstronomical society --\n
Astronomical Society of the Pacific --\n
Astronomical unit --\n
Astronomical year numbering --\n
Astronomy --\n
Astronomy and astrophysics --\n
Astrophotography --\n
Astrophysical Journal --\n
Astrophysics --\n
Astrophysics Data System --\nAsymptotic giant branch --\n
Aten --\n
Atkinson, Robert --\n
Atmosphere --\n
Atom --\n
Atomic clock --\n
Atomic nucleus --\n
Atlas (moon) --\n
Atria --\n
Aura --\n
Auriga (constellation) --\n
Auroral light --\n
Autumn --\n
Autumnal equinox --\nAuva --\n
Avior --\n
Axial tilt --\n
Axis --\n
Azimuth --\n
Aztec calendar
B
B-type asteroid --\n
Baade, Walter --\n
Babylonian and Assyrian religion --\n
Babylonian literature and science --\n
Background (astronomy) --\n
Background radiation --\n
Bacon, Roger --\n
Bahai calendar --\n
Bahcall, John --\n
Bainbridge, John --\n
Balthasar Behem Codex --\n
Barycenter --\n
Banneker, Benjamin --\n
Barnard's star --\n
Barnard, Edward Emerson --\n
Barsoom --\n
Baryon --\n
Baryonic matter --\n
Bayer designation --\n
Bayer, Johann --\n
Be star --\n
Be X-ray binaries --\n
Becrux --\nBedford Catalogue --\n
Bekenstein, Jacob --\n
Bell, Jocelyn --\n
Bellatrix --\n
Belinda (moon) --\nBenetnash --\n
BeppoSAX --\nBerlin Observatory --\n
Bernoulli, Jakob --\n
Bernoulli, Johann --\n
Bessel, Friedrich --\n
Beta Centauri --\n
Beta Pictoris --\n
Betelgeuse --\n
Beyond the standard Big Bang model --\n
Bianca (moon) --\n
Big Bang -- \n
Big bang nucleosynthesis --\nBig Bear Solar Observatory --\n
Big Crunch --\n
Big Dipper --\n
Big Rip --\n
Binary star -- \n
Binary system --\n
BL Lac object --\n
Black body --\n
Black hole --\n
Black hole thermodynamics --\n
Blazar --\n
Bliss, Nathaniel --\n
Blue giant --\n
Blue straggler --\n
Bode, Johann Elert --\n
Bohr, Niels --\n
Bolometer --\n
Bolometric magnitude --\n
Bolyai, Janos --\n
Bond, William Cranch --\n
Boomerang nebula --\n
Boötes --\nBoss, Lewis --\nBoulder Sunspot Number --\n
Bradley, James --\n
Brahe, Tycho --\n
Brane --\n
von Braun, Wernher --\nBrera Observatory --\nBright nebula --\nBrocchi's Cluster --\n
Broglie, Louis-Victor de --\n
Brown dwarf --\n
Bruce Medal --\n
Brudzewski, Albert --\nBrussels Observatory --\n
Burbidge, Geoffrey --\n
Burbidge, Margaret --\n
Bureau des Longitudes --\nButterfly Cluster --
C
C-type asteroid --\n
Caelum --\n
Calendar --\n
Calendar Round --\n
Caliban (moon) --\n
Callisto (moon) --\n
Calypso (moon) --\n
Camelopardalis --\nCanada-France-Hawaii telescopes --\n
Canadian Arrow --\n
Canadian Space Agency --\n
Cancer (constellation) --\n
Canes Venatici --\n
Canis Major --\n
Canis Minor --\n
Cannon, Annie --\n
Canopus --\n
Capella --\n
Capricornus --\n
Carbon --\n
Carbon star --\nCarbonaceous chondrite --\n
Cardinal directions --\n
Carina --\n
Carme --\n
Carpathian Mountains --\n
Carrington, Richard --\n
Cartesian coordinate system --\nCartier, Pierre --\nCartwheel Galaxy --\nCassegrain, Guillaume --\n
Cassegrain telescope --\n
Cassiopeia --\n
Chrétien, Henri --\n
Cassini probe --\n
Cassini, Giovanni --\n
Cassini, Giovanni Domenico --\n
Castor --\n
Cataclysmic variable star --\n
Catalogue of Galaxies and of Clusters of Galaxies --\n
Caucasus Mountains --\n
Cavalieri, Bonaventura --\n
Ceiba --\n
Centaurus --\n
Celestial body atmosphere --\n
Celestial coordinate system --\n
Celestial dynamics --\n
Celestial equator --\n
Celestial mechanics --\n
Celestial navigation --\n
Celestial pole --\n
Celestial sphere --\n
Celsius, Anders --\n
Celtes, Conrad --\n
Centaur --\n
Centaur rocket --\n
Cepheid variable --\n
Cepheus --\nCerro Tololo telescope --\n
Cetus --\n
Chamaeleon --\n
Chandler wobble --\n
Chandra X-ray Observatory --\n
Chandra X-ray Telescope --\n
Chandrasekhar limit --\n
Chandrasekhar, Subrahmanyan --\n
Charge --\n
Charge-coupled device --\n
Charon (moon) --\n
Chatelet, Emilie du --\n
Chinese calendar --\n
Chinese constellation --\n
Chiron --\nChondrites --\n
Chrétien, Henri --\nChristie, William --\n
Chromatic aberration --\n
Chromosphere --\n
Circinus --\n
Circle --\n
Circle of confusion --\n
Circle of latitude --\n
Circumference --\n
Circumpolar star --\n
Circumstellar disk --\nCivil Year --\n
Clark, Alvan --\n
Classical mechanics --\n
Climate change --\n
Cnidus --\n
CNO cycle --\n
Coalsack Nebula --\n
COBE --\n
Cobalt --\n
Cold dark matter --\nCollinder, Per --\nCollinder catalogue --\n
Color --\n
Color (disambiguation) --\n
Color temperature --\n
Columba (constellation) --\n
Coma (cometary) --\n
Coma aberration --\n
Coma Berenices --\n
Comet --\n
Comet Encke --\n
Comet Halley --\n
Comet Shoemaker-Levy 9 --\n
Comet Tempel-Tuttle --\nCommon Era --\n
Comoving distance --\n
Compact object --\n
Compact star --\n
Compton Gamma Ray Observatory --\n
Compton effect --\n
Compton scattering --\nCone nebula --\n
Conon of Samos --\n
Constellation --\n
Contact binary --\nCoordinate grid --\n
Coordinate system --\n
Coordinated Universal Time --\n
Copenhagen interpretation --\n
Copernican --\n
Copernican heliocentric system --\n
Copernican principle --\nCopernican revolution --\n
Copernicus, Nicolaus --\n
Coptic calendar --\n
Cordelia (moon) --\nCordillera Mountains --\n
Coriolis effect --\n
Corona --\n
Corona Australis --\n
Corona Borealis --\nCoronal gas --\nCoronagraph --\n
Corvus (constellation) --\n
Cosmic Background Explorer satellite --\n
Cosmic Background Radiation --\n
Cosmic censorship hypothesis --\n
Cosmic inflation --\n
Cosmic microwave background radiation --\n
Cosmic radiation --\n
Cosmic ray --\nCosmic ray spallation --\n
Cosmogony --\n
Cosmological constant --\n
Cosmological Principle --\nCosmological time --\n
Cosmology --\n
Cosmonaut --\n
Côte d'Azur Observatory --\nCoudé design --\n
Crab Nebula --\n
Crater (constellation) --\n
Crater --\n
Creation of the Universe --\n
Cressida (moon) --\n
CRESU experiment --\n
Crisium basin --\n
Crux --\n
Cubewano --\n
Culmination --\n
Curvature --\n
Cygnus --\nCygnus A --\n
Cygnus X-1
D
D-type asteroid --\n
Dactyl (asteroid) --\n
Danjon, André --\n
Danjon Scale --\n
Dark energy --\n
Dark matter --\n
Dark moon --\n
Dark nebula --\nDarwin crater --\n
Date --\n
Dawn --\n
Day --\n
Declination --\n
Deep sky object --\n
Deferent and epicycle --\n
Degenerate matter --\n
Deimos (moon) --\n
de Lacaille, Nicolas Louis --\n
de Vaucouleurs, Gérard --\n
Delphinus --\n
Deneb --\nDenebola --\n
Desdemona (moon) --\n
Despina (moon) --\n
Detached binary --\n
Diameter --\n
Diffraction-limited --\n
Diffuse sky radiation --\n
Dimension --\n
Dingle, Herbert --\n
Dione (moon) --\n
Dirac, Paul --\n
Dispersion --\n
Dispersion (optics) --\n
Distance --\n
Diurnal motion --\n
Dobsonian mount --\n
Dollfus, Audouin --\n
Doppler effect --\n
Dorado --\n
Double pendulum --\n
Double star --\n
Draco --\n
Drake equation --\n
Drake, Frank --\n
Draper, Henry --\n
Dreyer, John --\n
Drift velocity --\nDubhe --\n
Dumbbell Nebula --\n
Duncan, Robert --\n
Dusk --\n
Dwarf elliptical galaxy --\nDwarf galaxy --\nDwarf spheroidal galaxy --\n
Dynamical system --\n
Dynamical systems and chaos theory --\n
Dynamics (mechanics) --\n
Dyson, Frank --\n
Dyson, Freeman
E
E-type asteroid --\nEarly Imbrian --\n
Earth --\n
Earth atmosphere --\n
Earth impacts --\n
Earth science --\n
Earthshine --\n
Eccentricity --\n
Eclipse --\n
Eclipse cycle --\n
Eclipsing binary --\n
Ecliptic --\n
Ecliptic coordinate system --\nEcliptic longitude --\n
Ecliptic year --\n
Eddington, Arthur --\n
Eddington luminosity --\n
Egyptian calendar --\n
Einstein, Albert --\n
Einstein shift --\n
Elara (moon) --\n
Electric field --\n
Electromagnetic radiation --\n
Electromagnetic spectrum --\n
Electromagnetism --\n
Electron --\n
Electronuclear force --\n
Electroweak force --\n
Electroweak theory --\n
Ellipse --\n
Elliptical galaxy --\n
Elnath --\n
Elongation --\nElve --\n
Emission line --\n
Emission nebula --\n
Enceladus (moon) --\n
Encke, Johann Franz --\n
Encke division --\n
Energy --\nEnergy density --\nEnglish equatorial mount --\n
Entropy --\n
Ephemeris --\n
Ephemeris time --\n
Epimetheus (moon) --\n
Epoch --\n
Epoch (astronomy) --\n
EPR paradox --\n
Epsilon Eridani --\n
Epsilon Indi --\n
Equation of time --\n
Equator --\n
Equatorial bulge --\n
Equatorial coordinate system --\nEquatorial mount --\n
Equinox --\n
Equuleus --\n
Eratosthenian --\n
Eratosthenes --\n
Eridanus --\nEridanus (constellation) --\nEruptive variable --\n
Escape velocity --\n
Eta Carinae --\n
Euclidean geometry --\nEuctemon --\n
Eudoxus of Cnidus --\nEugenia --\n
Euler's angle --\n
Euler angles --\n
Euler, Leonhard --\n
Europa (moon) --\n
European Southern Observatory --\n
European Space Agency --\n
Event horizon --\n
Everett many-worlds interpretation --\n
Everett, Hugh --\n
Exeligmos --\nExit pupil --\n
Exoplanet --\nExterrestrial intelligence --\n
Extragalactic astronomy --\n
Extrasolar planet --\n
Extraterrestrial life --\n
Eye --\n
Eyepiece --\nEye relief
F
F-number --\n
F-type asteroid --\n
Fabricius, David --\n
Fabricius, Johannes --\n
Facula --\n
Farthest Galaxy --\n
Fermi paradox --\n
Fermi, Enrico --\n
Feynman, Richard --\nField curvature aberration --\nFinderscope --\n
First light --\n
First Point of Aries --\n
First Point of Libra --\n
FITS --\n
FitzGerald-Lorentz Contraction --\n
Flamsteed designation --\n
Flamsteed, John --\n
Flat earth --\nFlatness problem --\n
Fomalhaut --\n
Forbidden line --\n
Force --\nFork mount --\n
Fornax --\nFountain, John --\n
Fowler, William --\n
Frame of reference --\n
French Revolutionary calendar --\n
Frequency --\n
Full moon --\n
Fundamental plane --\nFurud --
G
G-type asteroid --\nGacrux --\n
Galactic astronomy --\n
Galactic bulge --\n
Galactic cluster --\n
Galactic coordinate system --\n
Galactic cosmic ray --\nGalactic disk --\n
Galatea (moon) --\n
Galaxy --\n
Galaxy bulge --\nGalaxy disk --\n
Galaxy classification --\n
Galaxy formation and evolution --\nGalaxy halo --\nGalaxy morphology --\nGalaxy nuleus --\n
Galaxy rotation problem --\n
Galileo Galilei --\n
Galileo probe --\n
Galilean moon --\n
Galilean transformation --\n
Galle, Johann Gottfried --\n
Gamma ray --\n
Gamma-ray astronomy --\n
Gamma ray burster --\n
Gamow, George --\n
Ganymede (moon) --\n
Gas giant --\n
Gassendi --\nGassendi crater --\n
Gathmann, Louis --\n
Gauss, Carl Friedrich --\n
Gegenschein --\n
Gaussian gravitational constant \n
Gaussian year \nGeller, Margaret --\n
Gemini --\n
Geminids --\n
General relativity --\n
Geocentric model --\n
Geocentric universe --\n
Geodesic --\n
Geographic coordinate system --\n
Geoid --\n
Geomagnetic storm --\n
Geometric solid --\nGerman equatorial mount --\n
Giacconi, Riccardo --\n
Giant (star) --\n
Giant impact theory --\n
Giant molecular cloud --\n
GJ 1061 --\nGliese, Wilhelm --\n
Global warming --\n
Globular cluster --\n
Gluon --\n
Gnomon --\n
Gold, Thomas --\nGoldstone Radio Telescope --\nGoodman-Martínez-Thompson correlation --\n
Grandfather paradox --\nGrand unification epoch --\n
Grand unification theory --\n
Gravitational binding energy --\n
Gravitational constant --\n
Gravitational force --\nGravitational instability --\n
Gravitational lens --\nGravitational micro-lensing --\n
Gravitational redshift --\n
Gravity --\n
Gravity wave --\n
Great Attractor --\n
Great circle --\n
Great Pyramid of Giza --\n
Great Wall (astronomy) --\n
Greek mythology --\n
Greenwich Mean Time --\n
Gregorian calendar --\nGregorian telescope --\n
Gregory, James --\n
Greisen-Zatsepin-Kuzmin limit --\n
Groups and clusters of galaxies --\n
GRS80 --\n
Grus --\nGuldin --\n
Guth, Alan --
H
H II region --\n
H-alpha --\n
Hadar --\n
Haemus Mountains --\n
Hale, George Ellery --\nHale telescope --\n\n
Hall, Asaph --\n
Halley, Edmond --\n
Halo --\n
Hamal --\n
Hamiltonian --\n
Hamilton, William Rowan --\n
Harvard College Observatory --\n
Hawking, Stephen --\n
Hawking radiation --\n
HE0107-5240 --\n
Heat-death of the Universe --\n
Hebrew calendar --\n
Heisenberg, Werner --\n
Heisenberg, Werner Karl --\n
Heka --\n
Helene (moon) --\n
Heliacal rising --\n
Heliocentric model --\n
Heliopause --\n
Helioseismology --\n
Helium --\n
Helium flash --\n
Helix Nebula --\n
Hemisphere --\n
Henry Draper Catalogue --\nHerbig-Haro object --\n
Hercules (constellation) --\n
Hercules Globular Cluster --\n
Herman of Carinthia --\n
Hero of Alexandria --\n
Herschel, Caroline --\n
Herschel, John --\n
Herschel, William --\n
Hertzsprung-Russell diagram --\n
Hertzsprung, Ejnar --\n
Hevelius, Johannes --\n
Hewish, Antony --\nHeze --\n
High-energy astronomy --\n
High-mass X-ray binaries --\n
Himalia (moon) --\n
Hindu calendar --\n
Hipparchus --\n
Hipparcos --\n
History of astronomy --\n
History of mathematics --\n
History of physics --\n
History of science and technology --\n
History of telescopes --\nHoag, Art --\n
Hoag's object --\n
Hobby-Eberly Telescope --\nHooker Telescope --\n
Horizon problem --\n
Horizontal branch --\n
Horizontal coordinate system --\n
Horologium --\n
Horrendous Space Kablooie --\n
Horrocks, Jeremiah --\n
Horsehead Nebula --\n
Hot dark matter --\n
Hour angle --\nHourglass Nebula --\n
Houtermans, Fritz --\n
Hoyle, Fred --\n
H-R diagram --\n
Hubble, Edwin --\n
Hubble flow --\nHubble Nebula --\n
Hubble sequence --\n
Hubble's law --\n
Hubble Deep Field --\n
Hubble Space Telescope --\nHuchra, John --\n
Huggins, William --\n
Humason, Milton --\n
von Humboldt, Alexander --\nHulse, Russell --\n
Huygens, Christiaan --\nHuygens Region --\n
Hyades --\n
Hydra --\n
Hydra (constellation) --\n
Hydrogen --\n
Hydrostatic equilibrium --\n
Hydrus --\n
Hyperbola --\nHypergalaxy --\n
Hyperion (moon) --\n
Hypernova --\n
Hypothetical planet
I
Iapetus (moon) --\n
IAU --\n
Icy moon --\n
Io (moon) --\nImbrian --\n
Impact basin --\n
Impact event --\n
Inclination --\n
Indus (constellation) --\n
Inertia --\n
Inertial force --\n
Inex --\n
Inferior planet --\nInflationary epoch --\n
Infrared --\n
Infrared astronomy --\nInner Rook Mountains --\n
Integrated Sachs Wolfe effect --\n
Intellectual history of time --\nInteracting binary stars --\n
Intercalary day --\n
Intercalary month --\n
Intercalation --\nInterferometer telescope --\n
Interferometry --\n
Intergalactic medium --\n
International Astronomical Union --\n
International Atomic Time --\n
International Earth Rotation and Reference Systems Service --\n
International Fixed Calendar --\n
International Geophysical Year --\n
International Space Station --\n
International Star Registry --\nInternational Sunspot Number --\n
Interstellar cloud --\n
Interstellar medium --\n
Ionosphere --\n
Iranian calendar --\n
IRAS --\n
Irregular galaxy --\nIrregular variable --\n
Isa, Ali Ben --\nI Sin --\n
Islamic calendar --\n
Isolated singularity --\nIthaca Chasma
J
Jahreiss, Hartmut --\njansky --\n
Jansky, Karl Guthe --\n
Janus (moon) --\n
Japanese calendar --\n
Jeans, James --\n
Jodrell Bank --\n
Jodrell Bank Observatory --\nJohannesburg Observatory --\n
Jones, Harold --\n
Jovian planet --\n
Julian Calendar --\n
Julian date --\n
Juliet (moon) --\n
Jupiter (planet)
K
Kamacite --\n
Kapteyn's Star --\n
Kapteyn, Jacobus --\n
Keck telescope --\n
Keck Observatory --\n
Keeler, James Edward --\n
Kelvin-Helmholtz mechanism --\n
Kepler's laws of planetary motion --\n
Kepler, Johannes --\n
Keplerian harmonic law --\n
Khayyám, Omar --\n
Kidinnu --\n
Kinetic energy --\n
Kirkwood, Daniel --\n
Kirkwood gap --\n
Kitt Peak National Observatory --\n
Klet Observatory --\n
Kruger 60 A --\n
Kruger 60 B --\n
KStars --\nKubiak, Marcin --\n
Kuiper Airborne Observatory --\n
Kuiper belt --\n
Kuiper, Gerard
L
Lacaille 9352 --\n
Lacaille, Nicolas Louis de --\n
Lacerta --\nLacus Aestatis --\nLacus Autumni --\nLacus Bonitatis --\nLacus Doloris --\nLacus Excellentiae --\nLacus Felicitatis --\nLacus Gaudii --\nLacus Hiemalis --\nLacus Lenitatis --\nLacus Luxuriae --\nLacus Mortis --\nLacus Oblivionis --\nLacus Odii --\nLacus Perseverantiae --\nLacus Solitudinis --\nLacus Somniorum --\nLacus Spei --\nLacus Temporis --\nLacus Timoris --\nLacus Veris --\nLagoon Nebula --\n
Lagrangian point --\n
Lagrange, Joseph Louis --\n
Langrange, Joseph-Louis de --\n
Lalande 21185 --\n
Lambert, Johann Heinrich --\nLanczos, Cornelius --\n
Langley, Samuel Pierpont --\n
Lansberg, Philip Van --\n
Lansberg's tables --\n
Laplace, Pierre-Simon --\n
Laplace's equation --\n
Large Binocular Telescope -- \n
Large liquid mirror telescopes --\n
Large-scale structure of the cosmos --\n
Larissa --\nLarson, Stephen --\n
Laser --\nLa Silla Observatory --\n
Lassell, William --\nLate Nectarian --\n
Latitude --\n
Law of physics --\n
LBT --\n
Leap second --\n
Leap year --\n
Leavitt, Henrietta Swan --\n
Leda (moon) --\n
Lemaître, Georges-Henri --\n
Lens (optics) --\n
Lenticular galaxy --\n
Leo --\n
Leo Minor --\n
Leonids --\n
Lepus --\n
Le Verrier, Urbain --\n
Levy, David --\n
Libra --\n
Libration --\n
Lick Observatory --\n
Light --\n
Light curve --\n
Light pollution --\n
Light year --\n
Light-time correction --\n
Lippershey, Hans --\n
List of astronomers --\n
List of astronomical objects named after people --\n
List of astrophysicists --\n
List of brightest stars --\n
List of constellations by area --\n
List of galaxies --\n
List of largest optical reflecting telescopes --\n
List of largest optical refracting telescopes --\n
List of meteor showers --\n
List of mnemonics for star classification --\n
List of nearest stars --\n
List of semiregular variable stars --\n
List of solar system objects --\n
List of solar system objects by mass --\n
List of stars --\n
List of telescope types --\n
Little Dipper --\n
Little Ice Age --\n
Lobachevsky, Nikolai Ivanovich --\n
Local Group --\n
Local Supercluster --\n
Lomonosov Gold Medal --\nLong Count --\nLong period variable --\n
Longitude --\n
Longitude prize --\n
Loop quantum gravity --\n
Lord Rosse --\n
Lorentz, Hendrik --\n
Lorentz transformation equations --\n
Lorenz, Edward --\n
Lorenz attractor --\n
Low Earth orbiting satellite --\n
Low-mass X-ray binaries --\n
Lowell Observatory --\n
Lower Imbrian --\n
Lovell Radio Telescope --\n
Lowell, Percival --\n
Luminance --\n
Luminiferous aether --\n
Luminosity --\nLuminosity distance --\n
Luna --\n
Lunar calendar --\n
Lunar eclipse --\n
Lunar geologic timescale --\n
Lunar mare --\n
Lunar meteorite --\n
Lunar phase --\n
Lunation --\n
Lunisolar calendar --\nLunisolar precession --\n
Lupus --\nLupus (constellation) --\n
Lyapunov, Aleksandr --\n
Lyman alpha forest --\n
Lynx (constellation) --\n
Lyot, Bernard-Ferdinand --\nLyot filter --\n
Lyra --\n
Lysithea
M
M13 --\n
M27 --\n
M31 --\n
M33 --\n
M41 --\n
M42 --\n
M45 --\nM49 --\n
M57 --\nM58 --\nM59 --\n
M60 --\n
M61 --\n
M81 --\n
M81 Group --\n
M82 --\nM84 --\nM86 --\n
M87 --\n
M90 --\n
M100 --\n
M101 --\nM104 --\n
M107 --\n
M-theory --\n
M-theory simplified --\n
M-type asteroid --\n
van Maanen, Adriaan --\nMädler, Johann Heinrich, von --\n
Maffei Group --\n
Magellanic Clouds --\n
Magnetar --\n
Magnetic field --\nMagnetic flux tubes --\n
Magnetic mirror --\n
Magnetism --\n
Magnetohydrodynamics --\n
Magnetopause --\n
Magnetosphere --\n
Magnification --\n
Magnitude --\n
Magnitude comparison --\n
Main belt --\n
Main sequence --\nMaksutov-Cassegrain telescope --\nMaksutov-Cassegrain --\n
Malayalam calendar --\n
Many-worlds interpretation --\nMarcy, Geoffrey --\n
Mare Anguis --\n
Mare Australe --\n
Mare Cognitum --\n
Mare Crisium --\n
Mare Fecunditatis --\n
Mare Frigoris --\n
Mare Humboldtianum --\n
Mare Humorum --\n
Mare Imbrium --\n
Mare Ingenii --\n
Mare Insularum --\n
Mare Marginis --\n
Mare Moscoviense --\n
Mare Nectaris --\n
Mare Nubium --\n
Mare Orientale --\n
Mare Serenitatis --\n
Mare Smythii --\n
Mare Spumans --\n
Mare Tranquillitatis --\n
Mare Undarum --\n
Mare Vaporum --\n
Manilius, Marcus --\n
Marius, Simon --\n
Mars (planet) --\n
Martian meteorite --\n
Maskelyne, Nevil --\n
Mass --\n
Mass-energy equivalence --\n
Mass transfer --\n
Massive compact halo object --\nMauna Loa Solar Observatory --\n
Maunder Minimum --\n
Maupertuis, Pierre Louis Moreau de --\n
Maxwell-Boltzmann distribution --\n
Maxwell's equations --\n
Mayan calendar --\nMayor, Michael --\nMcCormick Observatory --\n
McCrea, William --\n
Mean solar day --\n
Mean solar time --\n
Mean sun --\n
Méchain, Pierre --\n
Mechanics --\nMegrez --\n
Mensa (constellation) --\nMerak --\nMercator, Nicholas --\n
Mercury (planet) --\n
Meridian --\n
Messier marathon --\n
Messier object --\n
Messier, Charles --\n
Metal-rich --\n
Metal-poor --\n
Metallic hydrogen --\n
Meteor --\n
Meteor shower --\n
Meteorite --\n
Meteorites classification --\n
Metis (moon) --\nMeton --\n
Metonic cycle --\n
Mexican calendar --\n
Miaplacidus --\n
Michelson-Morley experiment --\n
Microquasar --\n
Microscopium --\n
Microwave --\n
Milky Way --\n
Minkowski, Hermann --\n
Mimas (moon) --\n
Minor planet --\n
Mintaka --\n
Minute of arc --\n
Mira --\n
Mira variable --\n
Mirach --\n
Miranda (moon) --\nMirfak --\n
Mirror --\n
Mizar --\n
MMT --\nMMT Observatory --\n
Modified Newtonian dynamics --\n
Möbius, August Ferdinand --\n
Molecular cloud --\n
Monoceros --\nMons Ida --\nMons Lyctas --\n
Montes Pyrenaeus --\n
Month --\n
Moon --\n
Moon phase --\n
Moore, Patrick -\n
Mt. Olympus --\n
Mount Palomar observatory --\nMount Stromlo Observatory --\n
Mount Wilson Observatory --\nMuliphem --\n
Müller, Johannes --\n
Multiple star --\n
Multiverse --\nMurzim --\n
Musca --
N
N-body problem --\n
Nabu-rimanni --\n
Nadir --\n
Naiad (moon) --\n
Naked singularity --\n
Naos --\n
Napier, John --\n
NASA --\n
National Optical Astronomy Observatories --\n
National Optical Astronomy Observatory --\n
National Radio Astronomy Observatory --\n
Natural satellite --\n
NEAR Shoemaker --\n
Near-Earth asteroid --\n
Near-Earth object --\n
Nebula --\nNebular hypothesis --\n
Nectarian --\nNectarian System --\n
Nemesis (star) --\nNemontemi --\n
Neptune (planet) --\n
Nereid (moon) --\n
von Neumann, John --\n
Neutrino --\nNeutrino mass --\n
Neutrino oscillation --\n
Neutron --\n
Neutron star --\n
Neutronium --
Nevanlinna, Rolf --\n
New General Catalogue --\n
Newcomb, Simon --\n
Newcomb's Tables of the Sun --\n
New moon --\n
Newton's laws of motion --\n
Newtonian physics --\n
Newtonian telescope --\n
Newton, Isaac --\n
Next Generation Space Telescope --\nNGC 1068 --\nNGC 2244 --\n
NGC 2264 --\nNGC 3227 --\nNGC 3516 --\n
NGC 4321 --\n
NGC 4486 --\nNGC 4593 --\nNGC 5128 --\nNGC 6027 --\n
NGC 6171 --\n
NGC 6240 --\nNGC 6751 --\n
NGC 7742 --\n
NGST --\n
Nice Observatory --\n
Nicholson, Seth Barnes --\n
Niels Bohr Institute --\n
Night --\n
Nilson, Peter --\nNOAO --\n
Node --\nNode (astronomy) --\n
Non-Euclidean geometry --\n
Non-standard cosmology --\n
Norma (constellation) --\n
North America Nebula --\n
North Pole --\n
North Star --\n
Nova --\n
Novara da Ferrara, Domenico Maria --\n
Novikov, Igor Dmitrievich --\nNovikov, Petr Sergeevich --\n
Nuclear decay --\n
Nuclear fusion --\n
Nucleocosmochronology --\n
Nucleosynthesis --\n
Nutation
O
Oak Ridge Observatory --\n
Oberon (moon) --\n
Oberth, Hermann Julius --\n
Obliquity of the ecliptic --\nObruchev crater --\n
Observatory --\n
Occultation --\n
Oceanus Procellarum --\n
Octans --\nOdysseus crater --\nOH maser --\n
Olbers' paradox --\n
Olbers, Heinrich Wilhelm Mathias --\n
Olympus Mons --\nOmega Centauri --\n
Oort cloud --\n
Oort, Jan --\n
Open cluster --\n
Ophelia --\n
Ophiuchus --\nOppenheimer-Volkoff limit --\n
Opposition (astronomy) --\n
Optical astronomy --\n
Optical axis --\n
Optical binary --\n
Optical depth --\n
Optical double --\n
Optical spectrum --\n
Optics --\n
Orbit --\n
Orbital elements --\n
Orbital period --\n
Orbital plane --\n
Orbital resonance --\n
Orbital revolution --\n
Orbital speed --\n
Orion --\n
Orion Nebula --\n
Orrery --\n
Oscillatory Universe --\nOuter Rook Mountains --\n
Overwhelmingly Large Telescope -- \nOwl Nebula --\n
Ozone layer
P
P-process --\n
P-type asteroid --\n
Palermo Technical Impact Hazard Scale --\n
Palimpsest --\nPallasite --\nPalomar Observatory Sky Survey --\n
Pan (moon) --\n
Pandora (moon) --\n
Panspermia --\nPanzano Observatory --\n
Parabolic mirror --\n
Parabolic reflector --\n
Parallax -- \n
Parallel --\nParanal Observatory --\n
Paris Observatory --\n
Parsec --\n
Parsons, William --\n
Particle horizon --\n
Particle physics --\n
Pasiphaë (moon) --\n
Pauli exclusion principle --\n
Pavo (constellation) --\n
Payne-Gaposchkin, Cecilia --\n
Pegasus --\n
Pegasus (constellation) --\nPeirce crater --\n
Penrose, Roger --\n
Penumbra --\n
Periapsis --\n
Perpetual calendar --\n
Perrine, Charles Dillon --\n
Perseus (constellation) --\n
Perseids --\n
Persian calendar --\nPhecda --\n
Philosophiae Naturalis Principia Mathematica --\n
Phoenix (constellation) --\n
Phoebe (moon) --\n
Phobos (moon) --\n
Photographic plate --\n
Photometry --\n
Photon --\nPhoton decoupling --\n
Photosphere --\n
Physical constant --\n
Physical geodesy --\n
Physical law --\n
Physical phenomenon --\n
Piazzi, Giuseppe --\n
Piazzi Smyth, Charles --\nPicard crater --\n
Pickering, Edward --\n
Pickering, William Henry --\n
Pictor --\nPierre Auger Observatory --\n
Pinwheel Galaxy --\n
Pisces --\n
Piscis Austrinus --\n
Planck units --\n
Planck's law of black body radiation --\n
Planck, Max --\n
Planet --\n
Planet X --\n
Planetarium --\nPlanetary Hypothesis --\n
Planetary nebula --\nPlanetary motion --\n
Planetary nomenclature --\nPlanetary phase --\n
Planetary ring --\n
Planetesimal --\n
Planetoid --\n
Planetology --\nPlanisphaerium --\n
Plasma --\n
Plasma equilibria and stability --\n
Plasma physics --\n
Pleiades --\nPlekhnaton --\n
Ptolemaic system --\n
Plutino --\n
Pluto (planet) --\n
Pogson, Norman Robert --\n
Poincaré, Henri --\n
Poisson, Siméon-Denis --\n
Polar Aurora --\n
Polar coordinates --\n
Polar coordinate system --\n
Polar distance --\nPolarimetry --\n
Polaris --\n
Polarization --\n
Polarized light --\n
Pole --\n
Pollux --\n
Pond, John --\n
Pons, Jean-Louis --\nPorrima --\n
Portia (moon) --\n
Posidonius --\n
Positional astronomy --\n
Potočnik, Herman --\nPotsdam Observatory --\n
Pre-Nectarian --\n
Precession --\n
Priestley, Joseph --\n
Primary mirror --\n
Prime meridian --\n
Primordial black hole --\nPrimordial material --\n
Procyon --\n
Procyon A --\n
Procyon B --\n
Prograde and retrograde motion --\n
Prograde orbit --\n
Proleptic Gregorian Calendar --\n
Proleptic Julian calendar --\n
Prometheus (moon) --\nPromonitorium Agarum --\n
Proper motion --\nProper motion distance --\n
Proportional --\nPropylid --\nProsen, Marjan Majo --\n
Prospero (moon) --\n
Proteus (moon) --\n
Proton --\nProton-antiproton imbalance --\n
Proton-proton chain --\n
Proto-star --\n
Protoplanetary disk --\n
Protostar --\nProtostellar disk --\n
Proxima Centauri --\nPrussian tables --\nPrutenicae Tabulae --\n
Ptolemy --\nPtolemy Cluster --\n
Puck (moon) --\n
Pulsar --\n
Puppis --\n
Pyxis
Q
Q-type asteroid --\n
Quadrant --\n
Quadrivium --\n
Quantum chromodynamics --\n
Quantum electrodynamics --\n
Quantum field theory --\n
Quantum gravity --\n
Quantum mechanics --\n
Quaoar --\n
Quark --\nQuark-antiquark epoch --\n
Quasar --\n
Quasar, Redshifts and Controversies --\n
Quetelet, Lambert Adolphe Jacques --\nQueloz, Didier --\n
Quintessence
R
R-process --\n
R-type asteroid --\n
Radial velocity --\n
Radiant --\n
Radiation pressure --\n
Radio astronomy --\n
Radio galaxy --\n
Radio star --\n
Radio telescope --\n
Radio wave --\n
Rainbow --\nRanzinger, Pavla --\n
Rare Earth hypothesis --\n
Ras Algethi --\n
Rayleigh scattering --\n
Reber, Grote --\nRed clump --\n
Red dwarf star --\n
Red giant --\n
Redshift --\n
Rees, Martin --\n
Reflection --\n
Reflection nebula --\n
Reflector telescope --\n
Refraction --\n
Refractor telescope --\n
Regiomontanus --\n
Regolith --\n
Regulus --\n
Reinhold, Erasmus --\n
Reitsema, Harold --\n
Research Consortium on Nearby Stars --\nResolution (optics) --\n
Resolving power --\n
Reticulum --\n
Retrogradation --\n
Retrograde motion --\n
Retrogade orbit --\n
Revised Julian calendar --\n
Reynolds, Alastair --\n
Rhea (moon) --\n
Rheticus, Georg Joachim --\nRho Coronae Borealis --\n
Rhyolite --\n
Riemannian geometry --\n
Rigel --\n
Right ascension --\nRijl al Awwa --\n
Rima Sirsalis --\n
Ring current --\n
Ring galaxy --\n
Ring Nebula --\n
Riphaeus Mountains --\n
Ritchey, George Willis --\n
Ritchey-Chrétien telescope --\n
Roche, Édouard Albert --\n
Roche limit --\n
Roche lobe --\n
Roman calendar --\n
Römer, Ole