In 1987, a star in the Southern Hemisphere was observed to grow in brightness by

Question

In 1987, a star in the Southern Hemisphere was observed to grow in brightness by almost a billion times. The cause was a supernova from a star in the Tarantula Nebula, which is part of the Large Magellanic Cloud. Astronomers refer to this event as supernova SN1987A. The distance from SN1987A to Earth is approximately 167,000 light-years. Since the supernova was first observed in 1987, how many years B.C. did the star actually explode? (Give the result as a positive number and round the answer to three significant figures).

Explanation / Answer

167,000 years before it was observed = 165013 B.C

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