This is my rendition of NGC 6888, also known as The Crescent Nebula.  It is an emission nebula in the constellation Cygnus.  While it looks like a supernova remnant, it is actually a planetary nebula.  (from wikipedia) It is formed by the fast stellar wind from the Wolf-Rayet star WR 136 (HD 192163) colliding with … Continue reading 8/28/2011 NGC 6888 The Crescent Nebula