Astronomy
Articles about stars, planets, space and the universe.
Canis Minor
Canopus
Canopus — Alpha Carinae, the bright star of the southern sky
Capricornus
Capricornus — the Sea‑Goat constellation
Carina (constellation)
Carina nebula
Carina Nebula (NGC 3372): overview, structure, and scientific importance
Carl Sagan
Carl Sagan: Astronomer, Science Communicator, and Advocate for Exploration
Carme (moon)
Carme — irregular retrograde moon of Jupiter
Carme group
Carme group — irregular retrograde moons of Jupiter
Carpo (moon)
Cartwheel galaxy
Cassini–Huygens
Cassiopeia
Cassiopeia (constellation)
Cave nebula
Celestia
Celestia — 3D real-time space simulation software
Celestia is a free, open-source 3D astronomy program that lets users travel through a realistic virtual universe, view stars and planets in three dimensions, and create scripted to
Celestial equator
Celestial equator: definition, geometry, and astronomical role
Celestial navigation
Celestial sphere
Celestial sphere — concept and role in astronomy and navigation
Centaur (planetoid)
Centaurus
Centaurus: Southern Constellation with Nearby Stars and Deep-Sky Objects
Centaurus A
Centaurus A (NGC 5128) — a nearby active radio galaxy
Cepheid variable
Cepheus (constellation)
Ceres (dwarf planet)
Cetus
CfA2 Great Wall
CfA2 Great Wall — large galaxy filament discovered in the CfA redshift survey
Chaldene (moon)
Chaldene — an irregular moon of Jupiter
Chamaeleon
Chamaeleon (constellation)
Chandra Deep Field South
Chandrasekhar limit
Chandrayaan-1
Chandrayaan-1: India's first mission to the Moon
Chandrayaan-2
Chandrayaan-2 — India's second lunar mission by ISRO
Charles Messier
Charon (moon)
Charon — moon of Pluto
Chi Cygni
Chi Cygni — a Mira-type pulsating red giant in Cygnus
Chiron (hypothetical moon)
Chiron (hypothetical moon of Saturn)
Circinus
Circinus (constellation)
Circinus galaxy
Circinus galaxy — a nearby Seyfert galaxy behind the Milky Way
Circular orbit
Cloverleaf quasar
Cloverleaf quasar (H1413+117) — a four-image gravitationally lensed quasar
Coalsack nebula
Colonization of Mars
Colonization of Mars: prospects, challenges, and approaches
Columba (constellation)
Coma Berenices
Comet
Comets are small icy bodies that orbit the Sun, developing glowing comas and tails when heated. They originate in distant reservoirs and reveal information about the early solar sy
Comet Borrelly
Comet Borrelly (19P/Borrelly)
Comet Hale–Bopp
Comet Hale–Bopp (C/1995 O1) — the Great Comet of 1997
Comet Shoemaker–Levy 9
Comet Shoemaker–Levy 9 and the 1994 Impacts on Jupiter