Nebulae are interstellar clouds of dust, hydrogen, helium and other ionized gases.
Nebulae
Dumbell nebula (M27) 
Dumbell nebula (M27) 
Iris nebula (NCG 7023) 
Ring nebula (M57) 
Sadr region (IC 1318) 
Orion nebula (M42) 
Pacman nebula (NGC 281) 
Eastern Veil nebula (NGC 6992) 
Bubble nebula (NGC 7635) 
