Artist’s impression of supernova 1993J
Artist’s impression of supernova 1993J

Artist’s impression of supernova 1993J


This is an artist’s impression of supernova 1993J, an exploding star in the galaxy M81 whose light reached us 21 years ago. The supernova originated in a double-star system where one member was a massive star that exploded after siphoning most of its hydrogen envelope to its companion star. After two decades, astronomers have at last identified the blue helium-burning companion star, seen at the center of the expanding nebula of debris from the supernova. The NASA/ESA Hubble Space Telescope identified the ultraviolet glow of the surviving companion embedded in the fading glow of the supernova. Links: NASA Press release Spiral galaxy M81 Supernova 1993J in spiral galaxy M81 Supernova 1993J Scenario for Type IIb supernova 1993J

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