http://astroanarchy.zenfolio.com/p62690868 Natural colors are composed from narrowband data. Channels are balanced so, that image match to visible spectrum, H-a + 24%S-II=Red, O-III=Green and O-III + 15%H-alpha=Blue.<br/>Images are mainly Red due the dominance of Hydrogen. Ionized Hydrogen glows light at wavelengtht of deep Red,656,6 nm. Principle is about same as in fluorescent tubes but much dimmer.<br/><br/>A study about the Colors: <a href="http://astroanarchy.blogspot.com/2009/11/colors-in-astro-images.html" target="_blank">http://astroanarchy.blogspot.com/2009/11/colors-in-astro-images.html</a><br/><br/><strong>Please, use a full screen and click the image, to see them as large as possible!</strong> en-us (C) J-P Metsavainio astroanarchy@gmail.com (J-P Metsavainio) Thu, 19 Nov 2009 06:21:37 GMT Fri, 29 Mar 2013 12:45:04 GMT Night Sky Scenic