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NGC 3239 and SN 2012A (Jan 27 2012) Image Credit & Copyright: Adam Block, Mt. Lemmon SkyCenter, University of Arizona About 40,000 light-years across, pretty, irregular galaxy NGC 3239 lies near the center of this lovely field of galaxies in the galaxy rich constellation Leo. At a distance of only 25 million light-years it dominates the frame, sporting a peculiar arrangement of structures, young blue star clusters and star forming regions (...) #astronomy