Yeah, Wikipedia says: The Crab Nebula was first observed by John Bevis, and corresponds to a bright supernova recorded by Chinese and Arab astronomers in 1054 --- On Sun, 1/25/09, zaurak@digis.net <zaurak@digis.net> wrote: From: zaurak@digis.net <zaurak@digis.net> Subject: Re: [Utah-astronomy] White dwarfs and YOU To: "Utah Astronomy" <utah-astronomy@mailman.xmission.com> Date: Sunday, January 25, 2009, 8:09 PM What I find most striking about M1, was that its supernova was observed and recorded by man. --- jimgibson00@yahoo.com wrote: From: Jim Gibson <jimgibson00@yahoo.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Subject: Re: [Utah-astronomy] White dwarfs and YOU Date: Sun, 25 Jan 2009 18:48:29 -0800 (PST) By the way, for your viewing pleasure I have uploaded a gif file of M1 showing the expansion of M1 over 30 years. There are 2 images, one taken in 1970 and the other in 2000. While M1 is not a White Dwarf the expansion of the nebula may lend itself to some of the discussion we have been having. If the luminosity were constant and I am not saying it is then one can imagine just by the expansion alone that luminosity would have to be spread out over a larger area. Heck, I have seen 30 years twice. That expansion is just a poof. See image here: http://www.slas.us/gallery2/main.php?g2_itemId=868 JG _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://gallery.utahastronomy.com Visit the Wiki: http://www.utahastronomy.com