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Friday, July 29, 2011

Black Hole Collision May Have Set Off Fireworks in the Milky Way

Black Hole Collision May Have Set Off Fireworks in the Milky Way - ScienceNOW: "The Milky Way's center houses a supermassive black hole so sleepy that it probably hasn't swallowed a decent meal for years. Yet a growing body of evidence indicates that the now-dormant beast, about as massive as 4 million suns, fueled a firestorm of activity just a few million years ago, including the sustained emission of some of the highest energy radiation in the universe. A new study offers a dramatic explanation for these past fireworks: The sleeping giant woke when a smaller black hole from another galaxy smashed into it."

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