What is Event Horizon and why does it not fall into the black hole?

Question

How do scientists know that matter in a red giant star eventually callapses at at the rate of the speed of light? Won't the universe be eventually consumed by black holes?

Answer 1

The event horizon isn't an object -- that is, it isn't made of matter that can fall anywhere. The event horizon is a DISTANCE, specifically the distance from the center of a black hole at which nothing -- not even light -- can escape. So because it's a distance, and not an object, it doesn't fall into the hole.

If anything, it gets farther from it -- because as the black hole becomes more massive, it attracts objects from farther and farther away. In effect, the event horizon moves farther from the black hole's center as the "hole" becomes more massive.

And I say "hole" because, of course, a black hole is actually the opposite of the kinds of holes we experience on Earth. That is, a hole in your garden, or a hole in your socks, is a place where there is nothing -- where there's essentially no matter (ignoring air molecules, bits of fluff, or your toes sticking through the fabric). A black hole, on the other hand, is the highest-density object we've ever detected in the Universe -- matter is packed in so tightly that you'd think it couldn't fit any more in. But it's so massive, and more to the point has such incredibly high gravitational attraction, that anything that passes inside the event horizon, even light, is trapped by the gravitational field and never escapes.

Answer 2

The event horizon is the point where light can no longer escape the gravity of the black hole. it is the limit. The matter sucked in does not quite arrive at the speed of light, they can tell this by the high energy radiation in the form of x rays being sent out right before the star is ripped apart by the black hole.

Galaxies are moving apart and accellerating, so black holes are always moving farther apart. In the future, space will be extremely spread out... So, no they will not clump together

Answer 3

the event horizon is the theory that the universe is not infinant it actually has a border. Black holes are theoretically portals to other dimensions. I read stephen Hawkings and a book about black holes thats what i remeber.