<p>An artist’s impression of Mrk 335, a supermassive black hole that produces X-ray flares. <a href="http://www.ap.smu.ca/~drw/docs/publications/mrk335_flare_paper.pdf">A recent study</a> suggests that it flashes because of the collapse of its corona, a shroud of high-energy particles that surrounds black holes.</p>

In a Flash

An artist’s impression of Mrk 335, a supermassive black hole that produces X-ray flares. A recent study suggests that it flashes because of the collapse of its corona, a shroud of high-energy particles that surrounds black holes.

Illustration courtesy NASA/JPL-Caltech

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