This image is the combination of RGB (color) plus luminance (gray scale) and HA (hydrogen alpha). You can see the other versions (except for the HA) that make up this final image here: LRGB http://www.flickr.com/photos/terryhancock/6979736193/in/photostream RGB http://www.flickr.com/photos/terryhancock/6833601484/in/photostream LUMINANCE http://www.flickr.com/photos/terryhancock/6979721029/in/photostream Total Exposure time 18 hours RED 12x15 min GREEN 16x15 min BLUE 16x15 min LUM 12x15 min HA 12x20 min Location: DownUnder Observatory, Fremont MI Date of Shoot 7th October 2011 Camera: QHY9M monochrome CCD StarlightXpress Color Filter Wheel Scope: TMB 130SS F7 Refractor using Williams Optics 68mm Field Flattener. Autoguided using QHY5 autoguider, StarlightXpress Ultra Slim Off Axis guider Paramount GT-1100S MKS 4000 German Equatorial Mount Image Acquisition software Maxim DL5 Stacking software Deep sky Stacker Registered with Registar Post Processed with Photoshop CS5.Location: DownUnder Observatory, Fremont MI Date of Shoot 2nd thru 7th October 2011 Clear Skies Terry Hancock www.downunderobservatory.com