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This Shower of Gamma Rays Is from a Flaring Blazar 5 Billion Years Ago

Five billion years ago, a blazar abruptly flared, triggered an intense rain of gamma rays. Racing across the universe for millennia, they finally slammed into NASA’s Fermi satellite over several days this June, setting a new record for the most luminous high-energy object we’ve ever seen. » 7/11/15 10:39am 7/11/15 10:39am

Black Hole Emits Ferocious Winds With the Energy of a Trillion Suns

A black hole and its galaxy are locked in a cosmic struggle, evolving in tandem and balancing each other's growth. In this artist's recreation, you can see cosmic winds howling out of supermassive black hole PDS 456. These winds are so strong that they prevent the galaxy from forming new stars. » 2/19/15 5:17pm 2/19/15 5:17pm

Here's Why Small Black Holes Are More Dangerous Than Big Ones

If you were going to travel close to a black hole in order to study it, which type should you choose? Most people would probably pick a smaller black hole, because it seems easier to avoid. But that's a fatal mistake. Small black holes can be far more dangerous than big ones, due to a terrifying process called… » 1/27/15 11:00am 1/27/15 11:00am