OPT Telescopes - "This is NGC 7635 AKA The Bubble Nebula, this is a nebula formed by a very active star shedding its hydrogen layers. The bubble is 7 light years across
Pictures of the Bubble Nebula - BBC Sky at Night Magazine
APOD: 2018 April 19 - NGC 7635: The Bubble Nebula
Bubble Nebula NGC 7635 – APOD by Astronomia.com
SH2-162 (NGC 7635, Bubble Nebula)
Bubble Nebula (NGC 7635)
NGC 7635 "Bubble" Nebula in Cassiopeia - Sketching - Cloudy Nights
The Bubble Nebula in 4K (NGC 7635) - YouTube
The Bubble Nebula (NGC 7635) in the Hubble palette : r/astrophotography