![Supernove 1987a before and after explosion [IMB neutrino research project]](https://quod.lib.umich.edu/cgi/i/image/api/thumb/bhl/BL003798/BL003798/!250,250)
Supernove 1987a before and after explosion [IMB neutrino research project]
IMB (Irvine, Michigan, Brookline), a collaboration between the University of Michigan, the University of California at Irvine, and the U.S. Department of Energy, was an experiment designed to determine the ultimate stability of matter. The blue giant star Sanduleak in the large magellenic cloud exploded 170,000 years ago giving off a pulse of neutrinos that arrived at earth on 23 February 1987. For a few weeks it was as bright as 100 million suns.
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