Nebulae are interstellar clouds of dust, hydrogen, helium and other ionized gases.
Nebulae
Dumbell nebula (M27) 
Iris nebula (NCG 7023) 
Flame nebula (NGC 2024) & Horsehead nebula (IC 434) 
Flame nebula (NGC 2024) 
Orion nebula (M42) 
Running man nebula (NGC 1977) 
North America nebula (NGC 7000) 
Pelican nebula (IC 5070) 
Soul nebula (IC 1848) 
Heart nebula (IC 1805) 
Tadpoles nebula (IC 410) 
Western Veil nebula (NGC 6960) 
Eastern Veil nebula (NGC 6992) 
Rosette nebula (NGC 2237) 
California nebula (NGC 1499) 
Pacman nebula (NGC 281) 
Flaming star nebula (IC 410) 
Cone nebula (NGC 2264)
