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M95 is a barred-spiral galaxy about 35 million light years away in the constellation of Leo. The bright blue ring surrounding the core of the galaxy traces a region of ongoing star formation. On March 16th, 2012 the death of a massive star in M95 erupted into a type IIP supernova (SN2012aw).
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While stellar parallax can only be used to measure distances to stars within hundreds of parsecs, Cepheid variable stars and supernovae can be used to measure larger distances such as the distances between galaxies.
This video, Measuring the Universe, gives a great introduction to this topic.