This is my image of NGC 7635, also known as the Bubble Nebula. It is a nebula that is being shaped by a young hot star in its center. The star, 40 times more massive than the Sun, is blowing a giant bubble of material into space. The dense gas surrounding the star is shaping the castoff material into a bubble. The bubble’s surface is not as smooth as a soap bubble. Its rippled appearance is due to encounters with gases of different thickness. 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.
I took my frames using narrowband Ha, SII and O3 filters and mapped these according the Hubble palette. Call it the Hubble-bubble!
Setup:
Telescope: Astrosib RC250 @ f/6 f=1500mm
Camera: QHY9
Mount: Mesumount 2
Guiding: OAG with Lodestar
Exposure: 17x20min SII (R) + 15x20min Ha (G) + 13x20min O3 (B)
Date: July 31st, August 1st & 3rd, 2013
Location: Overijse, Belgium
I’ve also mapped the narrowband frames to a palette which is more in line with the regular RGB colour scheme. Ha-lights are used for the R-channel; O3-lights complete the G&B channels.
Bart Delsaert - Astrophotography 