Explore · 642 entities

Deep Sky

Galaxies, nebulae, clusters, and black holes beyond the Solar System.

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Galaxy
Andromeda Galaxy
The nearest large spiral galaxy to the Milky Way and the most distant object readily visible to the naked eye.
Galaxy
Antennae Galaxies
Barred spiral galaxy in Corvus, magnitude 10.2.
Galaxy
Antennae Galaxies
Barred spiral galaxy in Corvus, magnitude 11.04.

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Nebula
California Nebula
Nebula in Perseus, magnitude 5.
Nebula
Carina Nebula
H II region in Carina, magnitude 3.
Star cluster
Caroline's Cluster
Open cluster in Canis Major, magnitude 7.2.
Nebula
Cat's Eye Nebula (NGC 6543)
A complex planetary nebula in the constellation Draco, one of the first to be studied with a spectroscope.
Galaxy
Centaurus A (NGC 5128)
A prominent radio galaxy in Centaurus, one of the closest active galaxies to Earth.
Star cluster
chi Persei Cluster
Open cluster in Perseus, magnitude 3.8.
Nebula
Christmas Tree Cluster
Cluster with nebulosity in Monoceros, magnitude 3.9.
Star cluster
Coalsack Cluster
Open cluster in Crux, magnitude 6.9.
Galaxy
Cocoon Galaxy
Lenticular galaxy in Virgo, magnitude 13.82.
Nebula
Cocoon Nebula
Cluster with nebulosity in Cygnus, magnitude 7.2.
Galaxy
Coddington's Nebula
Barred spiral galaxy in Ursa Major, magnitude 10.46.
Nebula
Copeland's Blue Snowball
Planetary nebula in Andromeda, magnitude 8.3.
Nebula
Crab Nebula
A supernova remnant produced by a stellar explosion recorded by astronomers in 1054 CE.
Nebula
Crescent Nebula
H II region in Cygnus, magnitude 7.44.
Black hole
Cygnus X-1 (black hole)
The compact object of Cygnus X-1 — the first widely accepted black hole. A bright X-ray source in Cygnus discovered in 1964, it is a stellar-mass black hole of roughly twenty-one solar masses pulling gas from its blue-supergiant donor star (HD 226868). It was the subject of a famous bet between Stephen Hawking and Kip Thorne, which Hawking conceded in 1990.
Nebula
The Cone Nebula
A tall pillar of cold molecular gas and dust, about seven light-years long, sculpted by the radiation and winds of hot young stars in the NGC 2264 star-forming region in Monoceros. The Cone lies at the southern end of the same complex as the Christmas Tree Cluster, roughly 2,700 light-years away, and is a textbook example of a star-forming pillar.

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Nebula
Jupiter's Ghost Nebula
Planetary nebula in Hydra, magnitude 7.7.

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Black hole
V404 Cygni
A stellar-mass black hole of about nine solar masses in a binary system in Cygnus, and one of the nearest black holes with a precisely measured distance from radio parallax. Normally quiet, it erupted in a dramatic X-ray and radio outburst in June 2015 — a nearby microquasar caught devouring gas from its companion.

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