can any one tell me about black holes?

Answer 1

A star takes birth from nebula. Then in the ending years of its life it's volume gets increased and becomes red supergiant. Then it becomes supernova for a few months or years but about 10 billion times as bright as our sun. Then
1) It can get recycled into nebula OR
2) It can become a neutron star OR
3) It can become a black hole.

Black holes are thought to form from stars or other massive objects if and when they collapse from their own gravity to form an object whose density is infinite: in other words, a singularity. During most of a star's lifetime, nuclear fusion in the core generates electromagnetic radiation, including photons, the particles of light. This radiation exerts an outward pressure that exactly balances the inward pull of gravity caused by the star's mass.

As the nuclear fuel is exhausted, the outward forces of radiation diminish, allowing the gravitation to compress the star inward. The contraction of the core causes its temperature to rise and allows remaining nuclear material to be used as fuel. The star is saved from further collapse -- but only for a while.

Eventually, all possible nuclear fuel is used up and the core collapses. How far it collapses, into what kind of object, and at what rate, is determined by the star's final mass and the remaining outward pressure that the burnt-up nuclear residue (largely iron) can muster. If the star is sufficiently massive or compressible, it may collapse to a black hole. If it is less massive or made of stiffer material, its fate is different: it may become a white dwarf or a neutron star

The gravitationsl pull of black hole is so powerful that it can even suck in light.

There is a theory that what gets suck by black holes is thrown out by a "whitehole" that matter travels through a "wormhole". But if this is true then may be one day we may travel with or more than the speed of light to reach very very far away points in the universe.

For more information search http://www.google.com for black hole.

Answer 2

Black holes are created from a mass with substantial energy, weight, density and size. From particles (mini black holes) to galactic black holes.
There is a fith dimension that lets this happen. Enough force is directed onto one spot and the vacuum is so great that a 2nd kind of gravity is created.
1st gravity is suction, 2nd gravity is subspace vacuum, 3rd gravity is magnetism and 4th gravity is like a 2nd gravity but not power reliant.
Black holes are like putting a hole in the sea, a whirlpool appears, but in 3d this time. Everything is equal to water. So the black hole pulls it in.
An infinte to 3d yet a small nip to the 5th dimension gives a little puncture.
Like a plug the more matter comes in the more the hole will start to clog.
A 2nd kind of black hole pushes out matter at the poles stopping it from being clogged. These are cosmic poles the stellar 4th gravity poles are the proper gravity (+) and if the mass is magnetic it has magnetic poles (+-) the 1st gravity type is (-+) and 2nd of the black hole, the cosmic poles are (-).
+=2, -=2, +-=-2 -+=+2. That means the + is at top and - is at bottom or the other way round with the 2nd gravity rate. + is just to pull in. - is to pull in then out the poles.
The greek term physics or φυσικός is involved.
Black holes pull in and turn the matter to the 5th dimension or subspace equalivent, sub-dark matter and energy in a small yet infinite pocket in space a sub universe. Like putting mass into a hover from the nose by suction, down a 6d tunnel to the 7th dimension. The sub dimension would be 7d and light and matter will not exist unless it is sterile or sub-macro. To us that infinite space can be 10 cm across in 7d the sub dimension is infinite. Black holes are all consuming and some lead only to 7d. You might as well shrink yourself to the micro-infinity.
A worm hole is a 6d tunnel leading to another brane or flat 3d time frame in the 5th dimension. Exotic matter is sterile and can keep the tunnel open for sterile or anti-sterlile material.
A sub worm-hole black hole stops time at the entrance as in a sub dimension time moves in different directions or doesn't move altogether.
There maybe a possibility to skip to this dimension as time moves backwards then skip into the main universe and you have gone back in time.
But worm-holes are more trustable than black holes.

Answer 3

A black hole is a concentration of mass great enough that the force of gravity prevents anything past its event horizon from escaping it except through quantum tunnelling behaviour (known as Hawking Radiation). The gravitational field is so strong that the escape velocity past its event horizon exceeds the speed of light. This implies that nothing, not even light, inside the event horizon can escape its gravity. It is, however, theorized that wormholes can provide an exit path for energy or matter. The term "black hole" is widespread, even though it does not refer to a hole in the usual sense, but rather a region of space from which nothing can return.

The existence of black holes in the universe is well supported by astronomical observation, particularly from studying X-ray emission from X-ray binaries and active galactic nuclei.

Answer 4

Here's an awesome website that covers black holes in some depth. If that level is a bit too hard to understand, try their links.

http://archive.ncsa.uiuc.edu/Cyberia/Expo/numrel_nav.html

Years ago I had a crush on a young man. Lying on the grass in the park, holding hands, I asked him to talk to me about the stars. (I think I expected something like "I'll gather the stars for you to wear in your hair," or something sappy like that.) He began to tell me all he knew about black holes. I fell in love that very moment. With both the boy and physics. :-)

Answer 5

a black hole occurs when a star is running low on its life (energy) and it could even turn into a protostar (new star) or if it gains to much energy the star may explode and turn into a supernova and that supernova may turn into a black hole.. They have such a strong gravitational pull that not even light can escape.

Answer 6

an entrance to another dimension

Answer 7

smells like tuna

Answer 8

No, I've never seen any.....sorry!!