Why black holes are created.?

Question

WHY.

Answer 1

It's just a gravity thing.

Some clouds of gas don't even have enough gravity to pull together, or if they do, they just stay a clump of gas. These are nebulae.

Some have enough mass that the force of gravity and friction can create conditions favourable to fusion of hydrogen into helium. Welcome to star country.

But no star has a limitless supply of hydrogen. Eventually it runs out or is outcompeted by other atoms that get in the way. Then either fusion stops and the star explodes in a huge nova OR if there's enough mass it moves onto something heavier to fuse.

And so on and so on. Some stars, however, have TRULY massive gravities, and so they can start to do things really bizarre when they run out of normal fuel:

Neutron stars have enough gravity to force electrons and protons together... effectively making the star one single atomic nucleus. This is no mean feat, when you consider that the electric force is some 10^36 times more powerful than the gravitic force. A neuton star is also so small as to be practically invisible in stellar terms - if our sun were a neutron star, it would be the size of Manhattan Island instead 1.3 million times the size of Earth. Neutron stars also emit no light. But we can tell the're there because they still exert the influence of gravity and they're so pifflingly small in size.

Black holes are larger yet. A black hole has so much mass that it can distort space around it in such a way that nothing gets out. Even a neutron star will flare up and emit light as it passes through a cloud of new hydrogen as it fuses and rips the atoms to shreds. A black hole will not... things that hit a black hole just seem to disappear.

Thus we have a distinction between black holes and neutron stars. And we HAVE observed things that MUST be black holes, based on this difference. There are also any number of things that MAY be black holes around, but because they are surrounded by so much clutter or because our angle to them is not exactly right, we can't be sure if they are or are not.

Likewise, because black holes and neutron stars (as well is burned out husks of former stars called brown dwarfs) emit no light, it's difficult to be sure exactly how many of them are around, but not near enough to anything else to give signs of their presence.

Hope that helps!

Answer 2

How are black holes created, and what are they?


By definition, a black hole is an area of space that contains matter so concentrated within, that even light cannot escape. In order to fully develop how they are created; one also needs to know the life cycle of a star. When a star is formed from gasses, it begins as a dwarf star, and over the years it will continue to expand and change color from blue to red. At one point, the star uses all of its fuel. When this happens, the star begins to collapse and compress the core. This pressure makes the core become extremely hot, so the core burns the remainder of the nuclear fuel. Eventually the rest of the fuel is consumed and the core is crushed under the mass of the entire star. From here, a black hole can be created, or under less volatile circumstances forma neutron star (supernova) or a white dwarf. Although in theory a black hole can be made from any amount of matter, scientists believe that only stars much larger than our sun dying create them.


Knowing what they are and how they are created is not even close to knowing all there is about black holes however. They have many other interesting properties. For example, they have a ring around them called an event horizon. This is a spherical space, which marks the limit of the black hole. Going inside of this limit means that there is no escape.

There are also many questions people may ask about black holes. The most obvious is probably why are they black. Most people know it is because light cannot escape. But why not? Because the matter is so dense in a black hole, the gravity of black hole is enough that the speed of light is overcome before it can reach the event horizon. Since there is no light leaving the black hole, it appears completely black. One may also ask why nothing is able to escape light. This is because physicists have shown that nothing can move faster than the speed of light, and if light cannot escape, then nothing else can either.

So, finally, what do scientists not know about the origins and basic properties of black holes? The answer to that is a wealth of information. First, the theory behind black holes was a mystery until the 1970's when they were able to prove that black holes could exist. Scientists still have much to prove about these objects. First, is to prove that black holes are indeed created by imploding stars. Although they are fairly certain that this is how they are formed, but the actual evidence is not all there yet. Also, they are uncertain of the properties of black holes. If a black hole has such a great gravitational force, why will the entire universe not be consumed? This is not only unanswered, but they are not sure whether the universe will be sucked in or not. The event horizon is theoretically moving at the speed of light outward, but it never becomes any larger. They also have not figured out what happens when the event horizon forms either.

It is also up for conjecture whether a black hole is at the center of the Milky Way galaxy. They believe that many galaxies have a black hole center, and this would help explain some of the properties of galaxies, but it has yet to be proven. Another mind-boggling property of black holes is that even though nothing is supposed to be able to escape from its gravity, why do they give off radiation. This idea was first proposed by Stephen Hawking.

Beyond these difficult to answer questions, there is another side to black holes, up to this point I have only been speaking of non-rotational black holes with no electric charge. When you add these elements, there are things known as white holes, and the combination of a white hole and a black hole forms a worm hole. From these it is theorized that someone can enter a black or white hole and exit the corresponding white or black hole respectively. These variations create large strains on the space-time continuum as we know it.

Because black holes are not possible to simulate in laboratories now, they are extremely hard to study. The most advanced techniques used to research these anomalies of space-time are high-powered computer models. My best guess would be to study the radiation emanating from a known black hole. Perhaps from these emissions of energy, scientists will be able to uncover more about these mysterious space bodies.

Answer 3

Black Holes occur because a large amount of mass is located in close geographical proximity.

An earlier answerer commented that black holes are just a theory and have not been proven to exist - this is not really correct.

First, it's a loose use of the word "proof" : mathematically or logically speaking, a "proof" is a demonstration resulting in a conclusion that must be true if the premises which it draws upon are true. From this perspective, black holes have been proven to exist - any star with about 3 times the mass of our own sun (3 solar masses) should, mathematically, form a black hole.

Observing black holes is a little more tricky - becuase of the tremendous density of a black hole (millions of tons of matter compressed to a singularity), nothing beyond a particular radius (known as the Event Horizon) can escape from the Black Hole - including light. This means we can't really SEE Black Holes, except as the absence of light where light might be expected.

However, the relativistic warping of light beams has been observed in particular locations that is consistent with black holes.

Also, black holes help explain the idea of critical mass ; there is a particular equation that can be solved, and based on the result of that equation, we could determine whether our univserse is closed (will eventually contract), open (will expand forever), or static (will eventually reach an equilibrium). The critical mass is the amount of mass that would be required for our universe to be static; as of yet, we have not found that much mass in the universe. However, including a hypothesized mass for black holes more or less solves this equation (along with a few other hypothetical quantities, such as the mass for neutrinos and a few other things).

Answer 4

Astronomers have detected several black holes in X-ray-emitting binary star systems, where a normal star orbits a massive yet invisible companion that theory says must be a black hole.

Even more convincing evidence has come from the centers of several large galaxies, where stars move about so quickly that they must be caught in the grips of a massive object. By calculating the size and mass of these objects, the only conclusion seems to be that the center of these galaxies harbor supermassive black holes.

The gravity is great, as mentioned above, that even light cannot escape, thus a 'black hole.'

Answer 5

Hi !
One of your answers above was nearly accurate. We can't actually see a black hole...its gravity is so great that light can't even escape. We are pretty darned sure that they are there though. We can tell they are there because radiation escapes when matter passes the event horizon, on its way to the hole. We believe that a 'black hole' is the force causing this radiation to escape.
A black hole forms when a super massive star finally burns out most of its fuel,(hydrogen and helium), and then, being so heavy, crashes inward upon its self. As Dr. Stephen Hawking says, a 'singularity' is formed. As long as the star has fuel to burn, that explosive burning outward overpowers the tendency to collapse inward.
Yea...we could say that black holes are just theory... but this is by far the best theory offered to date. We are pretty certain that there is a huge black hole at the center of our Milky Way galaxy.

Answer 6

Black holes are in the middle of almost all Galaxy's what u think holds everything in orbit. They are first formed by the collapsing of a giant sun. the study acceleration toward the center will accelerate particles to the speed of light. When u reach the speed of light the mass becomes infinite. This in tern acvcelerates everything else . Compacts it to a few cubic ft. The mass is so great that even light canot escape. There is nothing that lets u see them u can only see the effects of the gravith. It is so hughe that it can inhal a sun.

Answer 7

Because God said: let there be black holes and there were black holes and it did please him.

And you might ask God: Why did you make black holes?

He would probably give you something like: well if black holes didn't exist, physics would go to hell and life as you know it wouldn't exist.

And so to this day, man has sought to study physics to understand what all that meant.

Answer 8

when a really big star runs out of fuel it will colapse on its self
when this happens and the mass of the star is big enough a black hole is created

Answer 9

Why are black holes here?

The laws of physics allows them to be, and enough time and oppertunity is sufficient enough to where it would be impossible to continue through time without one being created.

Answer 10

It formed when the massive and high density star collapsed then suddenly it will generate a strong magnetic force from its singular-(center of the blackhole) and it suck all the celestial objects in its path.