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Asked by tomalie to Sean on 14 Mar 2012.
Question: Carrying in from the black hole question, One day will all the black holes get bigger and bigger and eventually suck everything?
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Sean Murphy answered on 14 Mar 2012:
No. The boundary of a black hole is called the “event horizon,” and it has a limited extent. The gravity of a black hole is the same as a normal object, except that it’s usually a lot because most black holes are very dense. As long as you’re outside the event horizon, you can avoid getting sucked in. If you’re inside the event horizon, however, you’re doomed.
Comments
elliejade commented on :
Are we inside the event horizon?
Sean commented on :
No, the event horizon is the area of no return. Once inside the event horizon, even light can’t escape. This is what makes the black hole ‘black’.
tomalie commented on :
What if your close to it?xx
Sean commented on :
then it will be possible to escape if you have enough velocity. So it depends on how fast your spaceship is 🙂
blatantlyninja commented on :
As more matter passes the event horizon and gets pulled into the black hole, the density increases, so could the radius of the event horizon increase, resulting in a black hole expanding further and futher? Or is the radius of the event horizon only based on the original mass of the star that became the black hole?