A new way to find gigantic black holes paired up at the dawn of the Universe

Using what's really a pretty dang clever new technique, astronomers have discovered what appear to be two double-quasars (and possibly a third pair as well) billions of light years from Earth. This may help constrain how many of these ferocious objects existed when the Universe was young.

A quasar is a kind of active galaxy, a galaxy that has an actively feeding supermassive black hole in its center. As I've described before (in an article about binary quasars):

All big galaxies, and many smal...

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Published on April 13, 2021 06:00
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