October 23, 2021

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

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At the dark hearts of galaxies like the Milky Way lie supermassive black holes, with millions or even billions of times the sun’s mass. 

Some of those supermassive black holes are what scientists call active galactic nuclei (AGN), which spew out copious amounts of radiation like X-rays and radio waves. AGN are responsible for the twin jets of ionized gas you see shooting away in pictures of many galaxies.

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