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Darkness made visible

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Science  20 Dec 2019:
Vol. 366, Issue 6472, pp. 1434-1435
DOI: 10.1126/science.366.6472.1434

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Summary

Massive, ubiquitous, and in some cases as big as our Solar System, black holes hide in plain sight. Scientists have tracked how their gravity affects objects around them, but no one had ever seen one directly—until April. That's when an international team of radio astronomers released a startling close-up image of a black hole's "shadow," showing a dark heart surrounded by a ring of light created by photons zipping around it. To produce that evocative image required simultaneous observations by radio telescopes around the world and 2 years of data processing. That technological feat is Science's 2019 Breakthrough of the Year.

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