Friday, November 17, 2017
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NASA's Hubble space telescope captures supernova's light echo

Over a period of two-and-a-half years, NASA's Hubble Space Telescope observed the "light echo" of supernova SN 2014J in galaxy M82, located 11.4 million light-years away. The echo happens when light from the explosion bounces off a cloud of a giant cloud of gas and dust near the supernova.