In 1993,a star inside of galaxy M81 exploded in a supernova named SN 1993J. M81,located twelve million light years from Earth,is located in the constellation of Ursa Major. A supernova occurs when a massive star ceases to generate fusion energy in its core and collapses inward under the force of its own gravity,resulting in a cataclysmic explosion. SN 1993J is only the second supernova for which the progenitor star has been identified | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Lodriguss, Jerry |
Taille de l’image : | 2100 px × 1521 px |
Model Release : | Non requis |
Property Release : | Non requis |
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