explain blackhole?

Answer 1

all galaxies have black holes at their center. a black hole is where their is so much mass in one place that is has such a great gravitational pull that it has actually warped time-space. this does sound science fictiony which is why "black holes" are still a theory. no it cant make anything disappear. it can suck things in at a greater speed than light travels which is why they are so dark and nothing is visible inside. however xrays and infrared rays can escape, because they travel faster than light. black holes form from stars collapsing. our sun will not become a black hole because it is too small. it would need to be 2x to 3x larger to do this. go to the link below. it has many awsome videos and information. you could say its stellar? oh no dont say that...

Answer 2

A blackhole is a collapsed star whose foce of attraction is so immence that evenlight couldn't escape.When a large star has burnt all its fuel it explodes into a supernova. The stuff that is left collapses down to an extremely dense object known as a neutron star. We know that these objects exist because several have been found using radio telescopes.
If the neutron star is too large, the gravitational forces overwhelm the pressure gradients and collapse cannot be halted. The neutron star continues to shrink until it finally becomes a black hole. This mass limit is only a couple of solar masses, that is about twice the mass of our sun, and so we should expect at least a few neutron stars to have this mass. (Our sun is not particularly large; in fact it is quite small.)
A supernova occurs in our galaxy once every 300 years, and in neighbouring galaxies about 500 neutron stars have been identified. Therefore we are quite confident that there should also be some black holes.

Answer 3

A star stops shining and emitting light when its fusion of hydrogen into helium stops.In a small star like the sun, this process may take illions and billions of years.But in very giant stars it may last for a few million years as for the massive rate of fusion. At this stage a very big star can collapse very rapidly, causing an explosion. In this stage itis called a supernova.During this stage of the star the outer layers of the star are thrown off .The remaining core of the supernova then attains such a strong gravity that everything is sucked in,even light cannot escape it.Then it becomes a black hole.It is believed that black holes exist at the core of most galaxies .

hope dis helpsss!

Answer 4

A black hole is an object predicted by general relativity, with a gravitational field so powerful that even electromagnetic radiation (such as light) cannot escape its pull.

A black hole is defined to be a region of space-time where escape to the outside universe is impossible. The outer boundary of this region is called the event horizon. Nothing can move from inside the event horizon to the outside, even briefly, due to the extreme gravitational field existing within the region. For the same reason, observers outside the event horizon cannot see any events which may be happening within the event horizon; thus any energy being radiated or events happening within the region are forever unable to be seen or detected from outside. Within the black hole is a singularity, an anomalous place where matter is compressed to the degree that the known laws of physics no longer apply to it.

Theoretically, a black hole can be of any size. Astrophysicists expect to find black holes with masses ranging between roughly the mass of the Sun ("stellar-mass" black holes) to many millions of times the mass of the Sun (supermassive black holes).

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. It has also been hypothesized that black holes radiate an undetectably small amount of energy due to quantum mechanical effects. This is called Hawking radiation.

Answer 5

the concept of the black hole has been around for quite some time, it is only very recently that astronomers have found solid (if still somewhat indirect) evidence that they truly exist.

It is believed that black holes form when a very massive star (much more massive than our sun) exhausts its nuclear fuel and collapses under the force of its own gravity. During this collapse, the core of the star is crushed, achieving such high density that its gravitational field prevents all light and matter from escaping it. It is gravity, not magnetism, that prevents us from seeing a black hole directly. However, this gravity has a powerful effect on matter nearby the black hole, and observational evidence for their existence comes from measurements of material (gas and/or starlight) moving at tremendously high velocities in the vicinity.

Ultra-massive black holes apparently also exist in the cores of some, perhaps many, galaxies -- black holes with masses ranging from a million to a billion times that of our sun. Exactly how these formed, we do not know: it may taken place during the original gravitational collapse of material during the formation of the galaxy itself, or perhaps such later when gas and other matter gets funneled to the center of the galaxy due to interactions with other neighboring galaxies. Recent Hubble Space Telescope observations, as well as other data from ground-based telescopes, have shown that their presence in some nearby galaxies is almost a certainty.

Answer 6

frequently relativity, a black hollow is a area of area wherein the gravitational field is so useful that not something, consisting of sunshine, can get away its pull. The black hollow has a one-way floor, called an experience horizon, into which gadgets can fall, yet out of which not something can come. this is termed "black" because of the fact it absorbs each and every of the gentle that hits it, reflecting not something, purely like a suited blackbody in thermodynamics. Quantum diagnosis of black holes shows them to very own a temperature and Hawking radiation. inspite of its invisible indoors, a black hollow can exhibit its presence via interaction with different count. A black hollow could be inferred by using monitoring the flow of a collection of stars that orbit a area in area which seems empty. on the different hand, you possibly can see gas falling right into a very small black hollow, from a much better half action picture star. This gas spirals inward, heating as much as very severe temperatures and emitting fairly a lot of radiation which could be detected from earthbound and earth-orbiting telescopes. Such observations have resulted interior the medical consensus that, barring a breakdown in our recognize-how of nature, black holes do exist in our galaxy.

Answer 7

ill give you the easiest way to think about it. a black hole is a " dead" star. gravity is always trying to squeeze things into a smaller size. for smaller objecst such as planets it will only go so far because they are not massive enough to be squeezed any further. stars on the otherhand are very big. the only thing that keeps gravity from squeezing them into black holes is the heat that they emit from nuclear fusion. so its a game of gravity vs energy. when a star runs out of energy, gravity squeezes it into a very small space. contrary to popular belief you CANNOT get sucked into a black hole. you can fall onto one. just like falling onto earth. if the sun were to become a black hole right now, the earth would continue to orbit it exactly the same as it does now, because it has the same mass, it just wouldnt be "shinning"

Answer 8

To begin, you need to understand that what we know as 'gravity' is actually a bending or distortion of space itself. Any mass, like a planet or you or even just a speck of dust floating in the air bends the shape (..geometry..) of space. There are objects in space that have so much mass and thus so much gravity that nothing, not even light, can pull away from them. Because no light can leave them, we call these objects black holes.

Most black holes are the result of super-massive stars that have exploded (..gone 'supernova'..).

Answer 9

I agree with Eliz [Sp...with a slight modification.
You can get sucked in by them.
Many prominent scientists have experienced this aspect of black holes.
they accept the elegant logic that produces them.
There is no proof that they exist,they are a theoretical and mathematical entity that is useless to a universe like ours.

Answer 10

basicly a colapsed star. it colapces in on it self but maintains the same gravity and just sucks mater and light in it. It does relice Xrays and tackions