https://live.staticflickr.com/65535/51790369147_6b606ed03a.jpg Thor's Helmet by Blake Estes , on Flickr This is an RGBHOO image totaling 10.3 hours of exposure. Details are: PlaneWave CDK20 Planewave Ascension A200HR SBIG STX-16803 Astrodon 50mm Gen3 square filters R,G,B,Ha, OIII R: 5x600s...