i still dont understand what a black hole actually is?

Question

plz dont say it is a never ending space i want some facts and details

Answer 1

It is a mass so dense that gravity near it is so strong that escape velocity is more that 186,000 miles per second. Simply that and nothing more. All that other stuff is mostly speculation.

Answer 2

When a star dies, its enormous mass causes it to collapse into an incredibly dense sphere. The matter collapses until some subatomic force stops the collapse. Small stars collapse into white dwarfs, in which matter is compressed until the electrons can't be packed any closer. In larger stars, this resistance is overcome, the electrons are squashed into the protons (loosely speaking), and a neutron star results. In a really massive star, the gravitational pressure overcomes all known subatomic forces, and there is nothing to prevent all the matter from compressing down to a point.

What form, if any, this matter has is beyond our current understanding of physics. It is so dense that at some distance from its center, gravity is so strong that the escape velocity is equal to the speed of light. Beyond this surface, (the "event horizon") there is no physics to describe the space within. The term "black hole" describes this region which is beyond any physics that we know. So really, no one understands what a black hole is, other than that it is a more or less spherical region within which the laws of physics are undefined.

So we have no way of exploring, even theoretically, the inside of a black hole. At a great enough distance, the gravitational attraction of the black hole is no different from a normal star or star cluster of the same mass. But just outside the event horizon the gravitational filed is incredibly intense. Material orbiting this close moves very fast, and objects are ripped apart by the gravitational gradient (i.e. the part of the object nearer the center is attracted so much more strongly it is pulled away from the further parts). By themselves, large black holes are truly black, producing only infinitesimal amounts of Hawking radiation. What we can observe is energy emitted by matter accelerated to relativistic speeds as it orbits close to the black hole.

Answer 3

Dear Zeed:

This information is from the book, Astronomy, by Ian Ridpath, DK Publishing, NY, NY... And, if black holes seem a bit hard to understand, please don't feel alone. This entity is one of the least understood things in the Universe, and certainly
no one has ever seen or explored one, so all the information you might find is kind of theoretical, and based only on our observations from a great distance.

When a star's core is truly massive, its collapse does not stop at a Neutron Star as is normally the case (Page 67).
The neutrons are actually broken up into their component quarks, and the core becomes so dense that its gravity will not even let light escape. The result is a stellar-mass black hole. Sealed off from the Universe, black holes are among the strangest objects known to science. Their gravity affects the space around them, but they are difficult to detect.

An illustration of a giant funnel, shaped like the whirlppool of water formed when a toilet is flushed, is shown with segments of the funnel marked to note where various forces might be encountered. And, the illustration suggests that anything coming within the "event horizon" (sort of lip of the funnel) is captured by the intense gravity of the black hole. It is also suggested that the escape velocity needed to get away from this enormous pull exceeds the speed of light.
Therefore, no light comes out of these black holes in space.
When making observations of space, one would not, therefore, see a black hole, only its effect on nearby objects.

In some cases a huge disk is circling out there in space and all kinds of super heated material is flying around within this disk. The material is gradually being sucked into the center of the disk which appears as a black spot. Gas close to the center of the disk is heated to 180 million degrees F and intense X Ray radiation is given off. It is said that the center of the Milky Way Galaxy contains at least one, huge, black hole.

At the very center of the black hole is a tiny spot called the singularity which is the densest compaction of all matter that it is possible to conceive. No one knows all the rules of physics that exist within this "singularity", and everything is sort of speculative. I checked several reference texts that I own and found pretty much the same story in each one. So, these things are out there a long way away from us, and they are essentially the gigantic vacuum cleaners of the Universe in that they gobble up any and every thing that comes close to them.

For further information you might do a search on Google, or Yahoo. All kinds of information will pop up for you. Do not expect to find any photos for the reasons I mentioned above. Lots of pretty cool drawings are out there though which in general depict what I have already discussed.

To try and tell you more would suggest that I know more than this - which is not true.

Regards,

Zah

Answer 4

Think of it this way, a black hole isn't really a hole. It's most likely a sphere. Matter is 99% empty space little electron circling around a tiny proton and neutrons. When some stars die, they collapse in upon themselves and the pressure in the center is so great the not even atoms can exist. they are packed together so tight that their electrons are forced out of orbit. This is infinite density, matter with no emtpy space. This produces a field of gravity is so strong that not even a photon can resist it's pull, anything that gets to close will be pulled in and crushed into the same material the black hole is made of. Because not even light has enough energy to escape the pull the term black hold seamed appropiate.

Answer 5

Black holes are the evolutionary endpoints of stars at least 10 to 15 times as massive as the Sun. If a star that massive or larger undergoes a supernova explosion (yip like johnny from fantasic 4 1), it may leave behind a fairly massive burned out stellar remnant. With no outward forces to oppose gravitational forces, the remnant will collapse in on itself. The star eventually collapses to the point of zero volume and infinite density, creating what is known as a " singularity ". As the density increases, the path of light rays emitted from the star are bent and eventually wrapped irrevocably around the star. Any emitted photons are trapped into an orbit by the intense gravitational field; they will never leave it. Because no light escapes after the star reaches this infinite density, it is called a black hole.

Answer 6

I would amplify Cambelp's answer just to add that nothing CAN go over 186,000 mps (that's the speed of light, which is the absolute fastest speed anything can go), therefore there IS NO escape velocity, therefore NOTHING can escape a black hole. Ever. Not even light itself.

Also, because of the intense gravity, time itself changes inside the event horizon of a black hole: that is, time INSIDE the black hole stops, pretty much, relative to an observer outside the black hole.

Now you know why you still don't know what a black hole is. No one does, really.

Answer 7

A black hole is a point in space where time-space is so curved in on itself that the gravity prevents even light from escaping.
A black hole needs a huge mass to collapse to a point where its gravity is several hundred thousand times that of Earth.
There is an event horizon that, within it, everything is drawn into the hole. Outside it, the effects are less severe.

Answer 8

A black hole is a spherical mass of infinitely dense matter. Because this matter is so dense, a black hole that is roughly 30x the sun's size can have 3 million times the amount of mass. A black hole has such an intense gravitational field, that when anything whatsoever (includin photons [particles that light travel in]) enters its event horizon, it cannot escape.

Answer 9

It's a theory that is a mistake. The concept of a black hole came into existence due to it being thought that as a mass is accelerated that the mass gains energy in form of further mass. This concept is wrong. Accelerating mass changes frequency within in direction of travel. Line density in direction of travel equates with the concept of mass to mass. The end result of the present day concept is ridiculous. It states that a mass is able to become infinite - gotta be something wrong with the thought right from the start.

Try http://360.yahoo.com/noddarc "The Problem and Repair of Relativity."

Answer 10

Basically, it's material containing no empty space. You may not know this, but any atom of any element is mostly empty space. (Consider an apple to be nucleus of a hydrogen atom, the electron, or "surface" would be orbiting several hundred feet away. In between is nothing but space.) If you break up atoms into their sub-atomic components (particles), and you put these particles together, the empty space is removed, and you have a black hole.

Answer 11

A black hole is the mass of 2.5 of our suns crammed into a sphere 12 km in diameter.
The surface gravity is such that you would have to exceed the speed of light to escape from the surface
So light can't escape it is invisible