How is a blackhole formed?

Question

just curious

Answer 1

General relativity (as well as most other metric theories of gravity) not only says that black holes can exist, but in fact predicts that they will be formed in nature whenever a sufficient amount of mass gets packed in a given region of space, through a process called gravitational collapse; as the mass inside the given region of space increases, its gravity becomes stronger and (in the language of relativity) increasingly deforms the space around it, ultimately until nothing (not even light) can escape the gravity; at this point an event horizon is formed, and matter and energy must inevitably collapse to a density beyond the limits of known physics. For example, if the Sun was compressed to a radius of roughly three kilometers (about 1/232,000 its present size), the resulting gravitational field would create an event horizon around it, and thus a black hole.

Answer 2

so some distance as all of us understand, blackholes are purely shaped from the death of stars who's mass is comparable to, or greater effective than 8 photograph voltaic hundreds, i do no longer likely choose for that concept however, no longer if each and every galaxy centre includes a blackhole, besides the gravitational forces emitted from those black holes will pull them jointly, finally merely merging into one supermassive blackhole

Answer 3

Though the concept of a black hole was first proposed in 1783, it was Albert Einstein's 1915 theory of general relativity which put the idea on a firm theoretical footing. Einstein showed that gravity can bend the path of light just as it bends the path of any other moving object - the only reason we don't observe this effect in our daily lives is that light moves fast and gravity pulls weak. When this was confirmed by observations, the idea of a black hole became obvious. If you pack enough material together, its gravitational pull should be strong enough to not only bend light's path but also keep it from escaping, just as the Earth is strong enough to pull back much slower objects (like baseballs) to its surface.

Regular black holes are thought to form from heavy stars (perhaps those which start off with masses more than 20 or 25 times that of the Sun, but this is still an area of active research). When these stars end their lives in a supernova explosion, their cores collapse and gravity wins out over any other force that might be able to hold the star up.

Eventually, the star collapses so much that it is contained within its Schwarzschild radius, or event horizon, the boundary within which light cannot escape. At this point, the black hole is extremely tiny; a black hole with the mass of the Sun would fit in a small town, while one with the mass of the Earth would fit in the palm of your hand! The material inside the Schwarzschild radius will continue to collapse indefinitely, reaching the point where our understanding of the laws of physics breaks down. But no information from inside the Schwarzschild radius can escape to the outside world.

Supermassive black holes, meanwhile, form differently - perhaps from the merger of many smaller black holes early in the universe's history - and grow over the years as they suck in gas from their surroundings.

We can't observe black holes directly, but we do see their effect on surrounding material - gas and dust which lets out its last gasp before being sucked into the black hole or flung away in a jet.

Black holes, in fact, are extremely efficient at converting the energy of incoming material into emitted light. The gas which falls into a black hole doesn't plunge in directly, for the same reason the Earth doesn't plunge into the Sun. Instead, it tries to move around the black hole in an orbit, forming what is known as an accretion disk.

Material in the accretion disk slowly spirals inward as it loses energy due to friction - the huge gravitational tides near the black hole are excellent at ripping apart this material and heating it to high temperatures. The inner disks of supermassive black holes reach thousands of degrees Kelvin (similar to the temperatures at the surface of a hot star), while smaller black holes can heat their disks to millions of degrees, where they emit in the x-ray part of the spectrum.

Black holes, therefore, are some of the brightest objects around. Quasars can be detected out near the edge of the visible universe, where they shine with the light of trillions of Sun, while microquasars in our own galaxy can easily be hundreds of thousands of times brighter than the Sun, even though they are typically only ten times as massive.

Answer 4

here's a website
http://en.wikipedia.org/wiki/Blackhole

Answer 5

it forms when a giant star dies. giant stars have very strong gravity which can even attract light. these become black holes when no more light is produce and them selves dont reflect any.

Answer 6

Any body with sufficient mass to counteract any opposing forces will collapse into a black hole. That's all there is to it.

Answer 7

when a woman opens their handbag