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quasars

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Art for "Galactic Beacons Get Snuffed Out in a Cosmic Eyeblink"
astrophysics

Galactic Beacons Get Snuffed Out in a Cosmic Eyeblink

By Shannon Hall
November 21, 2018
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Quasars powered by supermassive black holes have been unexpectedly vanishing. Scientists have started to figure out why.

Art for "A Short History of the Missing Universe"
Abstractions blog

A Short History of the Missing Universe

By Katia Moskvitch
September 19, 2018
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Astronomers have known where the universe’s missing matter has been hiding for the past 20 years. So why did it take so long to find it?

astrophysics

The Last of the Universe’s Ordinary Matter Has Been Found

By Katia Moskvitch
September 10, 2018
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For decades, astronomers weren’t able to find all of the atomic matter in the universe. A series of recent papers has revealed where it’s been hiding.

Magellan Baade telescope and CMB illustration
astrophysics

Earliest Black Hole Gives Rare Glimpse of Ancient Universe

By Joshua Sokol
December 6, 2017
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It weighs as much as 780 million suns and helped to cast off the cosmic Dark Ages. But now that astronomers have found the earliest known black hole, they wonder: How could this giant have grown so big, so fast?

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