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.
Feed your need for heavenly views of the universe with our pick of the most awe-inspiring space pictures. This week, a snake of plasma slithers across the Sun, NASA scientists prep for the cold, and the early universe’s chemistry gets a close-up.