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| Description: The Crab Nebula and Pulsar (a) This nebula, named for the crablike appearance of its filamentary structure in early visible-light telescope images, is the remnant of a supernova seen in A.D. 1054. The distance to the nebula is about 6000 ly, and its present angular size (4 by 6 arcmin) corresponds to linear dimensions of about 7 by 10 ly. Observations at different wavelengths give astronomers information about the nebula’s chemistry, motion, history, and interactions with preexisting gas and dust Picture Stats: Views: 608 Filesize: 237.77kB Height: 900 Width: 902 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18626 |