Bubble Nebula (NGC 7635) and M 52

clic for 30% size 1200 x 799 (375 kB)

Clic here for 50% size 2000x1332 (860 kB)


About this Image

NGC 7635, the Bubble Nebula, a nebula that is being shaped by a young hot star in its center. It is an expanding shell of glowing gas. The shell is being shaped by a very strong stellar wind of material and radiation which is emanating from the bright star forming shock waves. 11,300 light-years from us, the Bubble Nebula lies in the constellation Cassiopeia, the open cluster M52 northeast of the Bubble lies in the foreground in 5000 light years distance. Check a wider view here.
North is up.

Below you see a crop on the center of NGC 7635 at 75/150% size.

clic for 150% size 982 x 889 (148 kB)

Technical Details


16" Cassegrain in corrected prime focus at f/3

Mount MK-100 GEM
Camera SBIG STL-11000M at -20C, 1x1 bin, internal filter wheel
Filters Astronomik Ha, G, B
Date Sep 08 2005.
Location Wildon/Austria
Sky Conditions mag 5 sky, seeing 2.5", temperature 18 C
Exposure Ha:O-III:B = 120:60:60 minutes (30-minute sub-exposures for H-alpha, 10 min subs for G, B),
Processing Image aquisition, calibration, aligning, stacking, color synthesis in Maxim DL 4.11;
Photoshop: H-alpha as red and blended 30% as L channel, levels and curves, color balance;
Center of the Bubble processed in 200% size, selective sharpening for bright parts