A Supernova That Shouldn’t Exist

Galaxy UGC 5460 in Ursa Major was host to the supernova SN 2022esa (Credit : ESA/Hubble & NASA)

For decades, astronomers believed that the most massive stars in the universe lived fast and died quietly, collapsing directly into black holes without the spectacular fireworks of a supernova explosion. That understanding has been dramatically overturned by observations of SN 2022esa, a peculiar supernova that erupted from an incomprehensibly massive star and is now destined to become a black hole binary system.

Universe Today
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