please list the multiple ways that a black hole can be formed?

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. For example, if you compressed the Sun to a radius of three kilometers, about four millionths of its present size, it would become a black hole. As the mass inside the given region of space increases, its gravity becomes stronger — or, in the language of relativity, the space around it becomes increasingly deformed. Eventually gravity gets so strong that nothing can escape; an event horizon is formed, and matter and energy must inevitably collapse to a density beyond the limits of known physics.

A quantitative analysis of this idea led to the prediction that a stellar remnant above about three to five times the mass of the Sun (the Tolman-Oppenheimer-Volkoff limit) would be unable to support itself as a neutron star via degeneracy pressure, and would inevitably collapse into a black hole. Stellar remnants with this mass are expected to be produced immediately at the end of the lives of stars that are more than 25 to 50 times the mass of the Sun, or by accretion of matter onto an existing neutron star.

Stellar collapse will generate black holes containing at least three solar masses. Black holes smaller than this limit can only be created if their matter is subjected to sufficient pressure from some source other than self-gravitation. The enormous pressures needed for this are thought to have existed in the very early stages of the universe, possibly creating primordial black holes which could have masses smaller than that of the Sun.

Supermassive black holes are believed to exist in the center of most galaxies, including our own Milky Way. This type of black hole contains millions to billions of solar masses, and there are several models of how they might have been formed. The first is via gravitational collapse of a dense cluster of stars. A second is by large amounts of mass accreting onto a "seed" black hole of stellar mass. A third is by repeated fusion of smaller black holes.

Intermediate-mass black holes have a mass between that of stellar and supermassive black holes, typically in the range of thousands of solar masses. Intermediate-mass black holes have been proposed as a possible power source for ultra-luminous X ray sources, and in 2004 detection was claimed of an intermediate-mass black hole orbiting the Sagittarius A* supermassive black hole candidate at the core of the Milky Way galaxy. This detection is disputed.

Certain models of unification of the four fundamental forces allow the formation of micro black holes under laboratory conditions. These postulate that the energy at which gravity is unified with the other forces is comparable to the energy at which the other three are unified, as opposed to being the Planck energy (which is much higher). This would allow production of extremely short-lived black holes in terrestrial particle accelerators. No conclusive evidence of this type of black hole production has been presented, though even a negative result improves constraints on compactification of extra dimensions from string theory or other models of physics.

Answer 2

The collapse of a very massive star can creaate a black hole (much more massive than the sun). Primordial black holes were probably formed by extream pressures and temperatures in the early universe. Scientists still aren't sure how supermassive black holes at the centers of galaxies are created but it is likely a combination of the high density of stars in the centers of galaxies and high temperatures and pressures involved in forming galaxies.

Answer 3

There is only one way that I know and that is the collapse of a large sun. As it collapses the gravity pulls all this material to the center and sense the sun has boiled off most of the electrons ,it just pack-es ,and pack-es it to about a cubic ft. or 2 with the gravity increasing as everything gets smaller. The gravity increases to the point that even light cant escape. the photons are converted to electrons to replace the electrons missing from the atoms. The gravity is completely off the scale crushing everything. and the cycle of the sun starts over again.

Answer 4

There is only one way, a massive white main sequence star going supernove its own gravity is so great that the explosion doesn't blow the star outwards with no internal reaction there is no outward pressure to stem the inward pushing gravity the matter is then compressed until the very atoms merge, this continues until you have an infinatley small point a singularity.

Ps Hope I get an A+

Answer 5

If there is a supernovae probably the black hole form. I mean if star that more massive than our sun would explode it could form and block hole.

Answer 6

The Mayans in no way finished the calender, genuine. yet, on 12/21/12, its the top of the 5th Mayan Cycle. no longer the top of the international. yet!!! all the different cycles resulted in some sort of disaster. So... Yeah... i'm extremely in basic terms hoping its some sort of unusual coincidene and each thing is going properly. Afterall, i'm no longer Mayan. i'm Aztec. I discovered that stuff from a Mayan in Chichen Itza.

Answer 7

Only one way. By accumulating the mass