What is a BLACK HOLE??

Question

it is a fact that:

time slows down near a blck hole;

inside it stops completely

Answer 1

Its a giant invisible object with a massive gravitational pull.

Answer 2

It's an entire stars mass crammed into the area the size of an atom, but the scary thing is you can't see them, nor do they ever die out!, They're tracked down if a star gives of a weird shaped light as light bends around it!

Also... The milky way may be circling a black-hole... or super black-hole itself so we're never away from the danger of a black-hole!

Answer 3

Uranus

Answer 4

First, I'll tell you what a Black Hole is NOT.  

Black Holes are NOT:  

-an actual hole  

-time traveling tunnels  

-gateways to other dimensions  

-cosmic vacuum cleaners  

-wormholes  

In simple terms, a Black Hole is just the evolutionary end point of a massive star (stars at least 10-15 solar masses).  A Black Hole is a stellar remnant.  With no outward force to oppose its gravitational forces, the remnant collapses in on itself.  Eventually, the star reaches a point of zero volume and infinite density, known as a singularity.  Black Holes are "black" because we can't see them.  Their gravity is so intense that even light can't escape.  Scientists can detect them because as they accrete matter (as matter gets pulled toward them by gravity) the matter heats up, ionizes, and emits x-rays.  The x-rays are sent off into space before the matter crosses the Schwarzschild radius (also known as the event horizon).  

Black Holes are not vacuum cleaners, sucking up everything in space.  If our sun were replaced with a Black Hole of the same mass, Earth's orbit around the sun would be unchanged.  

On Black Holes and TIME:  

The closer something gets to the Black Hole's event horizon, the light that it emits takes longer and longer to climb back out and reach an observer some distance away.  

If your friend Bob was watching you approach a Black Hole, Bob would see you get closer and closer to the event horizon, moving slower and slower, but would never actually see you cross.  

This is just an optical illusion.  

You, in fact, would cross the event horizon in about eight minutes and be crushed to death mere seconds later.  

:-)

Answer 5

" a theoretical massive object, formed at the beginning of the universe or by the gravitational collapse of a star exploding as a supernova, whose gravitational field is so intense that no electromagnetic radiation can escape.

An area of space-time with a gravitational field so intense that its escape velocity is equal to or exceeds the speed of light.a region of space resulting from the collapse of a star; extremely high gravitational field." Courtesy of dictonary.com(not my words)

Answer 6

When a star of enough mass collapse on itself, its gravity is so strong that nothing can escape even light

Answer 7

It's what sucks people in when you bend over.

Answer 8

The edge of the black hole is called the event horizon, time slows down as you approach it until you get to the edge. Then time stands still but it wouldn't matter as you would be strung out like spaghetti and traveling at the speed of light towards the centre. You would reach the end of time and space pretty quicky, in fact in zero time! So long, its the edge of the universe baby!

The actual matter that makes up the mass of the black hole is at the center. It is a dot of infinite density and infinitely small size. The matter in the black hole has effectively left our normal dimensions but its mass remains in our universe sucking in whatever gets near it.

Answer 9

Naomi Campbell has one

Answer 10

Have you never heard of the Black Hole of Calcutta. Your facts are wrong.

Answer 11

Well, a black hole is a region of space in which the gravitational field is so powerful that nothing, not even light, can escape its pull after having fallen past its event horizon. Also, the term "Black Hole" comes from the fact that, at a certain point, even electromagnetic radiation, like, visible light is unable to break away from the attraction of these massive objects. I hope I helped!

Answer 12

Well in fact there are no facts in science. EVERYTHING is guess work. And from the most logic guess we build upon.

A black hole is 'guessed' to be a place of infinite mass that causes anything and everything in its vicinity to be sucked in and crushed into a unlimited 'mass' not even light can escape its pull.

Thus it is black.

Science in a nut shell.

Answer 13

A black hole is a super massive star that is about to die, but there is not enough nuclear fusion to keep the star up so the star collapse in on it's self.

*time does slow down

*time does not stop it just goes VERY VERY slow

*they are in the middle of most galaxies even our own Milky Way

*there are two different sizes, one in the middle of galaxies are called super massive black hole. The other I can't remember

*there is so much gravitational pull that not even light can escape

DOES THAT ANSWER YOUR QUESTION OR IS THAT TO MUCH

Answer 14

as for the last few questions about time, no one really knows. in fact to only a few years ago (or decades) no one really new if a black hole was anything more than a theory. there has just been recent study of a black hole near or within our own galaxy but so little is known about them that you cant really answer the question with fact.

what is know is that like others have said, when a start dies (meaning it uses all its energy) and implodes (rather than explodes) and the energy in its core sucks in it creates an extreme gravitational force. technically the entire star is sucked into itself meaning billions of tons of mass is condensed into a teeny weeny iddy bitty spot. this creates such a strong gravity that anything within its radius will be pulled into its mass; both destroying the object and increasing the mass of the hole.

again, where does all this mass go? no one knows, which is why worm holes and such are so intriguing about black holes because eventually though you would think anything would reach its maximum mass collection and then what? BOOM (possibly our big bang)

any star can become a black hole even our sun. hope that helps and no Wikipedia cutting and pasting at all.

Answer 15

it is a name of a pub in Calcutta

Answer 16

a place of infinite mass

Answer 17

a dead star. like, if the sun burns out in time, it becomes a black hole and sucks everything that crosses it

Answer 18

black hole is a region of space in which the gravitational field is so powerful that nothing, not even light, can escape its pull after having fallen past its event horizon. The term "Black Hole" comes from the fact that, at a certain point, even electromagnetic radiation (e.g. visible light) is unable to break away from the attraction of these massive objects. This renders the hole's interior invisible or, rather, black like the appearance of space itself.

Answer 19

A blackhole is any body whose escape velocity exceeds the speed of light. Normally these are formed at the end of the lives of high mass stars, but they also appear to form in the centre of galaxies. There might also be micro black holes that formed in the big bang.

Time does slow down near a blackhole and it stops at the event horizon. There is no "inside" of a black hole.

Royce Y. That is a very odd thing for a physicists to say. There is very good evidence for the existence of  black holes... for example AGN and Cygnus  X-1. At what point does the burden of proof become sufficient for something to become a fact? Clearly for you it never does.

Answer 20

when a star is massive enough it reaches up to a stage where it becomes a white dwarf and then the supernova explosion takes place. after the explosion a neutron star is formed but if the star is too massive then it will form a black hole. this has high gravitational  field strength and it is so dense that even light cannot escape through it.. x*x

Answer 21

A black hole is a singularity, meaning it is an infinitely massive collection of matter that has collapsed into itself in an infinitely small area, creating an unimaginable gravitative pull around it.