Image: M101 hires STScI-PRC2006-10a

Description: the galaxy Messier 101 (M101, also known as NGC 5457 and also nicknamed the Pinwheel Galaxy) lies in the northern circumpolar constellation, Ursa Major (The Great Bear), at a distance of about 21 million light-years from Earth. This is one of the largest and most detailed photo of a spiral galaxy that has been released from Hubble. The galaxy's portrait is actually composed of 51 individual Hubble exposures, in addition to elements from images from ground-based photos. A high-res version with 15852 x 12392 pixels in jpg and tiff format is also available, see below for url.
Title: M101 hires STScI-PRC2006-10a
Credit: http://www.spacetelescope.org/news/html/heic0602.html ([cdn.spacetelescope.org/archives/images/screen/heic0602a.jpg direct link]) See also: http://hubblesite.org/newscenter/newsdesk/archive/releases/2006/10/image/a
Author: Credit: Image: European Space Agency & NASA Acknowledgements: Project Investigators for the original Hubble data: K.D. Kuntz (GSFC), F. Bresolin (University of Hawaii), J. Trauger (JPL), J. Mould (NOAO), and Y.-H. Chu (University of Illinois, Urbana) Image processing: Davide De Martin (ESA/Hubble) CFHT image: Canada-France-Hawaii Telescope/J.-C. Cuillandre/Coelum NOAO image: George Jacoby, Bruce Bohannan, Mark Hanna/NOAO/AURA/NSF
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