Monster Black Holes

Scientists have discovered black holes that are far more massive than they had thought possible.

By Emily Sohn, 00:00 AM October 26, 2007

Black holes have long captured the imaginations of both kids and scientists. These incredibly dense objects cram the mass of huge suns into tiny points of space. The gravity of a black hole is so intense that it sucks in everything around it, including light.

Black holes can form in different ways. One type—called stellar black holes—form after massive stars collapse. Astronomers had thought that these black holes could only hold as much mass as about 10 of our suns.

Now, however, a team has f...

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