On 23 February 1987, SN1987A came howling into the world of astrophysics, the brightest supernova since SN1604 was seen by Kepler, Astronomers were astonished that its parent was a blue giant star, startled by its triple-ring system, and disappointednot to find the pulsar that should have been born during the observed neutrino flash. Now, at age ten, SN19 8 7 A has settled into a relatively tranquil childhood, but we are beginning to see hints of a stormy adolescence. On the tenth anniversary of the discovery of SN1987A, astronomers met in La Serena, Chile, to assess our understanding of this extraordinary event.
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