Astronomers spot 3,000 light-year 'light echo' of dying supermassive black hole

Astronomers spot 3,000 light-year 'light echo' of dying supermassive black hole
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The "active galactic nucleus" phase of the supermassive black hole at the heart of the galaxy Arp 187 has apparently just ended.



June 30, 2021 at 04:50PM
via Space.com read more...