emission nebula
cloud of ionized gas emitting light of various colors
Orion Nebula
diffuse nebula
Heart Nebula
HII region in the constellation Cassiopeia
Barnard's Loop
emission nebula in the constellation of Orion
supernova remnant
remnants of an exploded star
pulsar wind nebula
nebula powered by the pulsar wind of a pulsar
Dragonfish nebula
emission nebula and star-forming region in the constellation Crux
Horsehead Nebula
dark nebula in the constellation Orion
Homunculus Nebula
emission nebula in the constellation Carina
H II region
large, low-density cloud of partially ionized hydrogenium
planetary nebula
type of emission nebula