What is the black hole ?

Answer 1

A black hole is the super-dense body left behind after a massive star exhausts its fuel and collapses under its own gravity.

Imagine a balloon. The balloon maintains a steady shape and size because the pressure of the air inside of it pushing outwards is equal to the pressure of the air outside pushing inwards combined with the pressure of the rubber trying to squeeze inward. If the balloon leaks, then the inside pressure is not enough to balance the pressure exherted by the rubber, and it shrinks.

This is what happens to massive stars when they die. Stars like the sun maintain a stable size because the outward pressure of the nuclear fusion reaction balances the inward pressure of the star's own gravity. When the star exhausts its fuel, there is no more outward pressure, and the matter collapses in on itself. If there is enough mass in the star, the force of gravity compacts it so tightly that the surface of the body contracts very small.

Remember that the force of gravity is not only determined by mass, but also by seperation. The closer you get to the center of gravity, the stronger its influence. When you land on the surface of the body, say a planet, you are as close as you're going to get to the center of gravity, hence you are at the point of maximum gravity. (when you tunnel into the planet, its gravity actually gets weaker - but that's another long explanation)

If you want to leave the planet, you must go at least a certain speed, known as escape velocity. If you go any slower than this, then the gravity of the planet will eventually pull you back.

Now, we go back to black holes. Remember that the gravity squeezes the matter of the star to a very small space. If the space is small enough, there becomes a point where the escape velocity is the speed of light. This point is called the event horizon. Once the collapsing star is smaller than the event horizon, it becomes a black hole. At this point, there is nothing in the universe fast enough to escape the gravity of the black hole.

What happens inside the event horizon is mostly conjecture, because so far as we know, nothing can go faster than light. Therefore nothing can escape the black hole's gravity once it has crossed the event horizon, so there is no way to get any information back from beyond the event horizon to tell us what's going on in there.

Even math and the laws of physics cannot tell us what happens either. Inside the event horizon, the known laws of physics don't work / can't explain a region of space with the properties of a black hole.

If you want to know more about black holes, read "The Universe in a Nutshell," by Stephen Hawking.

Answer 2

You have an idea now just about what a black hole should be.
However a black hole in a theoretical entity that has some major flaws that doom it to the realm of a non viable entity

Answer 3

A black hole is a whole bunch of weird matter that some say might lead to another part of the universe. But it sucks up everything within it's range. Stars, planets, meteors, things like that.

Answer 4

Black Holes do no longer exist. No Probe or spacecraft has ever been close to a minimum of one and no person on planet Earth has ever considered one up close. that's the main ridiculous thought typical and dumb sheeple genuinely have faith what they have been advised by using scientists and astronomers that Black Holes exists whilst in actuality they never considered each and every individual they're doing is verifying their very own version of outcomes and records and shoving it in our faces and making want us to have faith in this delusion stated as black holes.

Answer 5

When a star dies, a black hole forms and thus does what the above person said. And that was it sucks up everything and light can't even escape from it.

Answer 6

It is a strong gravitational force that looks like a warp hole. It is created by a super nova.

Answer 7

a black hole is a star that has collapsed

Answer 8

Matter so dense and with such strong gravitation, that light cannot escape from it. Light traveling close to it will bend, however, and if you pick the right spot, you could see the back of your head (well assuming the gravitational forces don't rip you to shreds first, which they would.) I suggest using a mirror.

Answer 9

stellar remnants ,collapsed star of extreme density

Answer 10

It's hard to answer.