Answer #1:
As of now, it is undiscovered. Astronomers plan to send a probe into the centre. It
is often theorized that it leads to other universes. It is also theorized the Big Bang
was the result of excess matter entering a black hole.
Amendments, for clarity:
Sadly, nobody has any plan to send anything into a black hole, as it would involve
a few really hairy problems:
-- It would take thousands to millions of years for anything we launch to reach the nearest
black hole.
-- If our machine ever got there without falling apart, it would take hundreds or thousands
of years for the radio signal to return here and let us know.
-- If our machine succeeded in descending into the near vicinity of a black hole, it would be
torn apart by tidal forces ... the difference in gravitational force between its near side and
its far side.
-- If by some cosmic miracle our gadget lived long enough to approach within the
event horizon of the black hole ... have you read that within that distance, light
can't escape, and that's why the hole is black ? Well, what makes you think a radio
signal could escape, to bring any kind of information back to us ?
And another thing: There is no theory that a black hole leads to other universes,
and it is likewise not theorized that the Big Bang was the result of excess matter
entering a black hole. Both assertions are, at best, hypotheses incapable of test,
or of ever becoming theory.
Other than that, Answer #1 is a fine summary.
The point of no return on a black hole is called the event horizon. Once an object crosses the event horizon, it cannot escape the gravitational pull of the black hole.
That's called the "event horizon".
That's called the "event horizon".
That's called the "event horizon".
That's called the "event horizon".
An event horizon.
The event horizon.
That's called the "event horizon".
a singularity
Return to the Black Hole was created in 1997.
because nothing can escape from it, not even light
Gravity is towards the center of the black hole. The event horizon is not what attracts objects - it is simply the "point of no return".
The center of a black hole is called a singularity, where a huge amount of matter is crushed into a single point. That's scary, isn't it?
no, a black hole is a region. With nothing, not even light could escape, is a black hole. Around the black hole, an event horizon that marks the point of no return. The way it is named: the Black Hole, is because "it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics." What many people don't know is that the black hole is divided into 3 parts: the 'singularity', which is in the centre. The 'inner event horizon', which is the point of no return in black holes. After passing the point, light or matter can't escape the gravitational pull of the black hole. The matter or light will then disappear. And the 'outer event horizon', is the outer layer of the black hole.
To get pulled into a black hole, you must be within the black hole's event horizon, the point of no return. Otherwise, you will still be able to escape the black hole's gravity, if you traveled fast enough. Once you cross the event horizon, though, you will not be able to escape, no matter how fast you travel.
The so-called "event horizon" of a black hole is the point-of-no-return. That means that anything that gets inside the event horizon can't get out any more, even if if it moves at the speed of light.
This is usually considered to be the event horizon.However a spinning black hole spinning fast enough or a charged black hole with high enough charge might not have an event horizon, leaving just what is called a naked singularity.
The event horizon is the "point of no return" - nothing inside that can escape. In the simplest case (of a non-rotating black hole), this is a sphere, at a certain distance from the black hole's center. The size of the black hole is often taken to be the size of the event horizon.
Yes, the diameter of a black hole is finite. And the circumference, or more of just outside of the circumference, is known as the event horizon. This is the "point of no return" and once you get passed this point there is no escape.
The event horizon of a black hole.