Tuesday, December 5, 2006

Will Black hole suck up EVERY matter in the Universe?

A black hole has a "horizon," which means a region from which you can't escape and 100% being sucked into it. If you cross the horizon, you're doomed to eventually hit the singularity. But as long as you stay outside of the horizon, you can avoid getting sucked in. In fact, to someone well outside of the horizon, the gravitational field surrounding a black hole is no different from the field surrounding any other object of the same mass. In other words, a one-solar-mass black hole is no better than any other one-solar-mass object (such as, for example, the Sun) at "sucking in" distant objects. So as long as we don't go near the black hole or cross the horizon, we will not being sucked into a black hole.

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