Deep-Sky Object
Superbubble
A giant cavity blown by many supernovae.
Hundreds-of-parsecs cavities of hot gas in the ISM, carved out by the combined winds and supernovae of OB associations.
Overview
Hundreds-of-parsecs cavities of hot gas in the ISM, carved out by the combined winds and supernovae of OB associations.
See also
Wolf–Rayet Nebula
A bubble blown by a Wolf–Rayet star's wind.
Stellar Bubble
An ISM bubble blown by a single massive star.
Circumplanetary Disc
A disc of material around a young giant planet.
Andromeda Galaxy (M31)
The farthest thing you can see with the naked eye.
Orion Nebula (M42)
A stellar nursery glowing in Orion's sword.
Pleiades (M45)
The Seven Sisters — a young blue cluster.