the remnant of a supernova explosion, observed in 1054 a.d., in the constellation Taurus.
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Origin of Crab Nebula
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for crab nebula
the expanding remnant of the supernova observed in 1054 ad, lying in the constellation Taurus at an approximate distance of 6500 light years
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012