Information Sources

http://seds.lpl.arizona.edu/messier/m/m051.html

http://hubblesite.org/newscenter/archive/releases/2001/10/

http://hubblesite.org

http://www.nasa.gov

http://www.spitzer.caltech.edu/EPO/cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/images/m51galex.gif&imgrefurl

http://www.spitzer.caltech.edu/Media/releases/ssc2004-19/ssc2004-19a.shtml

http://www.aanda.org/index.php?option=com_base_ora&url=articles/aa/full/2001/43/aa1455/aa1455.html&access=standard&Itemid=81

http://adsabs.harvard.edu/abs/1989PhDT.........6S

http://www.astrocruise.com/m51.htm

http://cadcwww.dao.nrc.ca/dss/

http://pollux.as.arizona.edu/~robk/preprints/m51fnl.pdf

http://hubblesite.org/newscenter/archive/releases/2005/12/image/a

http://hubblesite.org/newscenter/archive/releases/1992/17/image/a/

http://seds.lpl.arizona.edu/messier/more/m051_snhst.html

http://findarticles.com/p/articles/mi_m1200/is_n24_v141/ai_12259546

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