Astronomy is a science involving the observation and explanation of events occurring outside Earth and its atmosphere. It studies the origins, evolution, physical and chemical properties of objects that can be observed in the sky (and are outside the earth), as well as the processes involving them.

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Subcategories

There are 20 subcategories to this category.

Archaeoastronomy Astrodynamics Astronomers Astronomical catalogues Astronomical surveys Astronomy books

A Astrophysics C Calendars Celestial coordinate system Celestial mechanics E Astronomical events H History of astronomy I Astronomical images

I cont. Astronomy images Interferometry L Large-scale structure of the cosmos O Astronomical objects Astronomical observatories P Astronomy people Planetary science

Articles in category "Astronomy"

There are 180 articles in this category.

Astronomy A Aberration of light Absolute magnitude Abundance of the chemical elements Adaptive optics Afocal projection Almucantar Amateur astronomy American Astronomical Society Analemma Angular diameter Apache Point Observatory Lunar Laser-ranging Operation Aperture synthesis Apparent magnitude Apsis Association of Universities for Research in Astronomy Asterism (astronomy) Astroarcheology Astrochemistry Astrology and astronomy Astrometric binary Astrometry Astronomer Royal Astronomer Royal for Scotland Astronomical League Astronomical Society of Southern Africa Astronomical Society of the Pacific Astronomical algorithm Astronomical catalog Astronomical distance Astronomical naming conventions Astronomical opposition Astronomical spectroscopy Astronomical surveys Astronomical units of length Astronomy Common Object Model Astronomy Day Astronomy and Astrophysics Astrophotography Astrophysics Asymptotic Giant Branch Autumnal equinox Axial tilt B B1900.0 B1950.0 BATTeRS Background (astronomy) Baily's beads Barycenter Bayer designation Besselian epoch Binary star Binary system (astronomy) Black drop effect Blink comparator Blue shift Bok globule British Astronomical Association Brocchi's Cluster C CERGA

C cont. CRESU experiment Campaign for Dark Skies Celestia Celestial body atmosphere Celestial sphere Cepheid variable Clickworkers Compton effect Conjunction (astronomy) Contact binary Coronagraph Correlation function (astronomy) D Declination Deep sky Detached binary Diurnal motion Double star E Earthshine Eclipse Ecliptic Ecliptic longitude Ephemeris Epoch (astronomy) Equinox Extraterrestrial skies Eye relief F Fingers of God First contact (astronomy) Frame of reference Full moon cycle G Galactic astronomy Galaxy classification Gamma-ray astronomy Gaussian year Gravitational binding energy Gravitational lens Great year Group 70 Guide Star Catalog Guide star Guinness book of Astronomy H H-alpha Heliacal rising Henry Draper Catalogue Hertzsprung-Russell diagram Horizon Horizontal branch Horn (telescope) Horseshoe orbit Hubble flow Hubble sequence I IUCAA Infrared astronomy Institute of Astronomy, Cambridge Intergalactic space International Astronomical Union International Earth Rotation and Reference Systems Service Interstellar cloud Interstellar medium Invariable plane J J2000.0

J cont. JPL Horizons Ephemeris System James Craig Watson Medal Jansky Julian day Julian epoch Julian year K Kelvin-Helmholtz mechanism Kemble's Cascade Kennedy-Thorndike experiment Kopernik Space Center L Laplace plane Large-scale structure of the cosmos Light curve Light day Light hour Light minute Light month Light second Light week Light-time correction List of astronomical topics Local/Temp Longitude of the ascending node Lorentz-Fitzgerald contraction hypothesis Low-mass X-ray binaries Luminosity Lunar Laser Ranging Experiment Lunar distance Lunar eclipse Lunar node M Messier marathon Metal-poor Metal-rich Metallicity Metonic cycle Michelson-Morley experiment Molecular cloud Monthly Notices of the Royal Astronomical Society N Nadir Naked eye Night Night sky O Oblate Observational astronomy Occultation Olbers' paradox Opposition spike P PPARC Parsec Peak of Eternal Light Photometry (astronomy) Planet-Crossing Asteroid Survey Planetarium Planetary orbit Polar distance (astronomy) Polar motion Polarization in astronomy Positional astronomy Precession