http://astroanarchy.zenfolio.com/p80640150 Enission Nebulae images with narrowband filters.<br/><br/>Red=S-II, Green=H-alpha and Blue=O-III <br/>Palette is generally known as a HST-palette. <br/>(Hubble Space Telescope)<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 05:57:01 GMT Wed, 22 May 2013 07:42:01 GMT Night Sky Scenic