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The White Dots in This Image Are Not Stars or Galaxies. They’re Black Holes – ScienceAlert

The image above may look like a fairly normal picture of the night sky, but what you’re looking at is a lot more special than just glittering stars. Each of those…

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The image above may look like a fairly normal picture of the night sky, but what you’re looking at is a lot more special than just glittering stars. Each of those white dots is an active supermassive black hole.
And each of those black holes is devouring material at the heart of a galaxy millions of light-years away – that’s how they could be pinpointed at all.
Totalling 25,000 such dots, astronomers have created the most detailed map to date of black holes at low radio frequencies, an achievement…

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