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Explanation: In 1993, a star in the galaxy M81 exploded. Above is a picture of the hot material ejected by this supernova explosion. The picture was taken in X-rays with the Advanced Satellite for Cosmology and Astrophysics (ASCA). Since M81 is a relatively nearby galaxy, it can be examined in close detail by observatories on or near the Earth. Since the Earth's atmosphere protects the surface from interstellar X-radiation, the above photo was taken from space. Studying the nature and distribution of the X-rays has allowed astronomers to determine the composition and temperature of the expanding supernova gas.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: M 81 - supernova
Publications with words: M 81 - supernova
See also:
- APOD: 2025 July 22 B A Double Detonation Supernova
- APOD: 2025 May 7 B Galaxy Wars: M81 versus M82
- 38 Hours in the M81 Group
- Messier 81
- APOD: 2023 October 11 B NGC 1097: Spiral Galaxy with Supernova
- APOD: 2023 July 9 B Doomed Star Eta Carinae
- APOD: 2023 May 22 B Supernova Discovered in Nearby Spiral Galaxy M101