February 23
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1987 - Supernova 1987a: A supernova is seen in the Large Magellanic Cloud.
1997 - A large fire occurs in the Russian Space station, Mir.
2005 - Astronomers announce the discovery of a galaxy, "VIRGOHI21," which consists almost entirely of dark matter.
2404 - Darsyn Syntranos is assigned as commanding officer of the USS Gettysburg, BC-1863.
