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The explosion was of an enormous star, 20 occasions the mass of our Sun, a so-called blue supergiant. Its life resulted in spectacular type in a course of known as a supernova, prosaically known as SN 1987A, by astronomers. It was the primary supernova to have been seen to the bare eye for 400 years, and was from a star whose particulars had been captured and recorded by astronomers earlier than it exploded.
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