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In one sentence, a black hole appears when a stellar mass, e.g. star, becomes so dense that the curvature of space around the mass becomes so great that light can not escape from a volume around the star called the event horizon.
There are more details for those who are interested.
A black hole is a result the curvature of space due to gravity. This is predicted by Einstein's theory of gravity. Black holes have been confirmed to the satisfaction of most scientists for the last three or four decades.
A black hole can be created when the mass of a star exceeds a certain critical mass and that mass is about 10 times the mas of the Sun. Normally, even a large star, hundreds of times more massive than the Sun, is not dense enough to create a black hole while it is burning in its normal fashion. It is only near the end of the life of a star that things happen which concentrate the mass near the center.
The process by which a star evolves to become a black hole is called gravitational collapse. This occurs when the star can not support its own weight. The material at the center of the star evolves normally as the star ages. It begins with a plasma of hydrogen atoms, evolves through the creation of helium and eventually heavier nuclei. During this process the center of the start gets very dense, but the pressure remains high enough to support the great mass above the center. For a large enough star, after burning for millions or billions of years, the fuel begins to run out and the pressures at the center crush the atoms.
Depending on the size of the star, life has three possible outcomes, a white dwarf star, a neutron star or a black hole. In the first case, light stars for a very massive white dwarf but do not suffer the gravitational collapse that obliterates all atoms. In the second case, a neutron star has collapsed, the nuclei of the original atoms all fused together but the mass remaining is not enough to curve space into a black hole. This neutron star formation may include a supernova explosion.
Finally, for the most massive stars, there is enough mass left at the end, even after a supernova explosion, to cause space to curve enough that light can not escape. That is a black hole.
There are more extensive details about the formation process and the properties of space-time around the black hole after it is formed that are outside of the present discussion.
A Black Hole is the result of a Star about twenty times more massive then our own Sun reaching the end of its life. They occur when ever one of these stars die, and since these stars have life-spans of only millions of years, they can occur fairly often, and can last for as long as there is more matter for them to absorb.
Also, it is theorized that a Mini Black Hole occurs when ever atoms are smashed in a Supercollider, however, these are not dangerous, and evaporate almost immediately.
A black hole is formed when a massive star collapses under its gravity, resulting in a region of spacetime where gravity is so strong that nothing, not even light, can escape its pull.
Anywhere where a large star stops shining. If the remaining mass, after the supernova explosion, is large enough, the star will become a black hole.
The condition for a black hole to exist is that there is a sufficiently large mass, in a sufficiently small volume.
Very often because space never ends so there are billions of black holes out there all ready and they form most likely every second.
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Where will you go if you fall in to a black hole?
Into the black hole's singularity.
What happens to a mass when it is swallowed by a black hole?
The object swallowed by the black hole is destroyed; its mass is added to the mass of the black hole.
What is the duration of The Black Hole?
The duration of The Black Hole is 1.63 hours.
What is the magnetic field of a black hole?
A black hole has no magnetic field.
Is a black hole know as a singularity?
No the singularity is at the core of the black hole.
What is the difference between a Scchwarzschild and a Kerr black hole?
A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.A Schwarzschild black hole is a non-rotating black hole. The Kerr black hole is a rotating black hole. Since the latter is more complicated to describe, it was developed much later.
What does the black hole do to the star?
A black hole originated as a star, that is, the star converted to a black hole.
Where will you go in a black hole it?
If you fall into a black hole, you'll go into the black hole and nowhere else.
What is the environment in a black hole?
probs black hole
Is the super massive black hole the largest black hole?
Black hole is a location in space that possesses so much gravity, nothing can escape from its pull. Yes, Super massive black hole is the largest black hole.
Can you make a black hole inside a black hole?
We know nothing about the conditions within a black hole, but it seems unlikely that a black hole could exist within a black hole, or even if this concept would have any meaning at all.
Is an Intermediate-mass black hole a type of black hole?
Yes. Intermediate-mass blackhole is a medium size black hole. Scientists have found stellar black holes and supermassive black holes but there is no prove that Intermediate-mass black type of black holes exist. My opinion is that they do exist because when a black hole is becoming a black hole supermassiveblack hole it will need to go though this stage of intermediate-mass black hole.
Where will you go if you fall in to a black hole?
Into the black hole's singularity.
What is at the center of the black hole?
A singularity is at the centre of a black hole.
Will a black hole destrow earth?
A black hole can,but it is very rare for a black hole big enough to swallow Earth.
Did black hole creats another star?
A black hole does not create a star. A black hole is formed when a star dies.
What will be happened with a smallest particle of your universe fall into black hole?
Anything that falls into a black hole will be destroyed. Also, anything that falls into a black hole will increase the black hole's mass.
