Bubble Neb­ula (NGC 7635) in Cassiopeia

About 1/​2° south­w­est of the open cluster M52 in the con­stel­la­tion of Cas­si­opeia, one can find the emis­sion neb­ula NGC 7635 known as Bubble Neb­ula and Cald­well 11. Like Thor’s Hel­met (NGC 2359) or Cres­cent Neb­ula (NGC 6888), a Wolf-Rayet star is repons­ible for the shape of this object. This star, BD 65 2522, the bright­est star (8.5mag) with­in the bubble, is blow­ing away the inter­stel­lar mater­i­al by its radi­ation power. The HII region itself is cata­loged as Sharp­less 162.

In this image, the Ha data was blen­ded to the lumin­ance chan­nel only to pre­serve the nat­ur­al col­ors as good as pos­sible. North is about upper left of the image.


RCOS 14.5″ f/​8
Apo­gee U16M
Astro­don Gen2
HaLRGB 960:600:340:340:300 min.
ROSA Remote Obser­vat­or­ies South­ern Alps
© Mar­tin Ruster­holz, Astrophotographer

Find­er Chart Bubble Neb­ula (NGC 7635) in Cassiopeia

Bubble Nebula Sky Chart - Astrophotography Martin Rusterholz

Image cre­ated by Skychart

About Me

Hello, my name is Martin Rusterholz. I’m a Swiss amateur astrophotographer living near Zurich, the biggest town in Switzerland. My interest in astronomy started when I was 16. At that time, I built my first Newtonian telescope and mount. I studied physics at the Swiss Federal Institute of Technology (ETH) which was the only study including at least some aspects of astronomy and astrophysics. “Looking at the nights sky is an experience touching everybody deeply inside, something common to all human beings independent to the language spoken by the individuals”. Deep-sky astrophotography is my passion.