Supernova (SN 2011fe) in M101, Pinwheel Galaxy
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Since 1986 a Supernova occure currently in M101 which may can be seen with the naked eye. The current light magnitude is between 9-10 mag*
M101 is situated in Ursa Maior and has a distance of 21 million light years from us. In the astronomical scheme of things, it is nearly in the neightbourhood.
*mag => light magnitude. Up to mag 5 you can see stars in big cities. In very dark aereas you can see stars up to mag~6. The higher the number is, the weaker is the star/planet. Planet Venus has in comparision the most brightness of -4mag.
©2011 photos& text by Thorsten Boeckel (tb)