Nebula

Noun

 * 1)  A cloud in outer space consisting of gas or dust.

Derived terms

 * dark nebula
 * diffuse nebula
 * emission nebula
 * planetary nebula
 * preplanetary nebula
 * protoplanetary nebula
 * reflection nebula
 * solar nebula
 * stellar nebula

Related terms

 * nebulosity
 * nebulous
 * nebular

Thesaurus
Black Magellanic Cloud, Crab Nebula, Gegenschein, bright diffuse nebula, coalsack, counterglow, dark cloud, dark nebula, diffuse nebula, dust cloud, gaseous nebula, nebula of Lyra, nebular hypothesis, nebulosity, nebulous stars, planetary nebula, ring nebula, the Coalsack, zodiacal light