Evolution of supernova 1993J, 1993-2000

Evolution of supernova 1993J, 1993-2000

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Caption: Evolution of supernova 1993J. Radio telescope observations of the expanding shell formed by supernova SN 1993J between May 1993 (top left) and February 2000 (bottom right). During the explosive death of a large star, the outer layers are propelled outwards as the collapsing core rebounds. This supernova was discovered on 28 March 1993. It is around 11 million light years distant, in the constellation Ursa Major. Its relative closeness allows observation by radio interferometry with arrays such as the Very Large Array (VLA) and the Very Long Baseline Array (VLBA). The expansion has decelerated from 16,000 to 10,000 kilometres per second.

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Keywords: 1900s, 1990s, 1993, 1994, 1995, 1996, 1997, 1998, 2000, 20th century, astronomical, astronomy, astrophysical, astrophysics, comparing, comparison, debris shell, decelerated, decelerating, deceleration, dying star, expanding, expansion, explosion, interferometer, interferometry, m81, outer layers, radio telescope, research, sequence, series, sn 1993j, space, star, star death, stellar evolution, supernova, supernova shell, universe, ursa major, vbla, very large array, very long baseline array, vla

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