Great Orion Nebula (M42) in Hydrogen Alpha
A version with the stars removed can be found here.
Location: Banglamung, Thailand (100 59 E, 12 55 N)
Date: 18 Jan, 2011
Camera: QHY-9 and Baader Ha filter
Telescope: William Optics FLT110
Frames: Fifteen 10 minute exposures.
Processing: Stacked in CCDStack, curves, levels and selective smart sharpened, noise reduction in