Does the gravity well i a black hole occur on both sides of the Accretion disc? (double sided blackhole)?
968297
The gravity is pretty much even all the way around, just like it is on Earth. The flat accretion disk is just the result of angular momentum of nearby matter. It is also the reason Saturn has flat rings and not just a cloud of stiff orbiting it.
203553
By black hole and singularity we mean two different things: \nA black hole is just the area around a singularity, where the escape velocity is equal to or greater than the speed of light. The event horizon itself forms before the singularity. \n\nIf you use Schwarzchild coordinates, you'll also come up with a singularity at the event horizon, but that's only because of the coordinate system. With a different set of coordinates - Kruskal-Szekeres or Eddington-Finkelstein - the singularity at the event horizon will disappear and the math works out to singularity at r = 0.
432010
a black hole is a region of spacetime from which nothing can escape because of gravity, and yes, they exist.  this was not a very detailed answer, but i may write more later.  you can follow the link below.\n\nhttp://en.wikipedia.org/wiki/Black_hole
600386
You don't need a black hole to be able hold itself together through gravity. Just look at the earth or the moon for example. They are nowhere near as dense as a black hole, yet they support themselves gravitationally.
373282
We haven't actually had a black hole close enough to experiment with, at least not that we know about--although there are theories about dryers having a black hole that eats socks, see earlier response!!--so most of the work on black holes is done with theory, prediciting what a black hole might do, and then seeing if something out there is doing it.\n\nNow, the best data seems to be based on the orbital velocities of stars in galaxies: the velocity distributions demand a truly massive central mass in a lot of the galaxies, one that is best viewed as a black hole.\n\nSome very nice data exists with observations of events predicted to happen with "near misses" with black holes--particles that get into the titanic gravity well of the black hole, but decay into two particles, one escaping the black hole.\n\nBut no one has actually seen a black hole do anything, directly..
7798
an accretion disk is a disk of matter from the smaller star that is being sucked into the other star by gravity.
1136303
A black hole is not actually a hole, but a physical object in space, consisting of ultra compact particals, contained in such a small area that thier gravitational pull is much stronger than any other celestial body of comperable size....  Basically you put all the matter and gravitational pull from a large star into the volume of a small moon... particles captured by a black hole are crushed and added to its composition. This in theory includes photons (light and other energy)as well.  As for whether black holes are hoax's or not.. the answer is no... we can see their effects on star near them, including gases that are syphoned, and other gravitational interactions.  Additionally when matter approaches a black hole and is accellerated, it reaches an energy level at the even horizon where xrays are emited, but not captured, which in turn we can also detect.  Though there is much we do not know about them, they definately exist, and most likely in much greater numbers than we oringinally thought.
170312
Are you talking about gravitational lensing?\n\nObviously, nothing, not even light can escape the gravitational pull of a black hole after it crosses the event horizon.\nBut is an object (or light) is a safe enough distance away from the black hole, it just experiences a pull towards it, it is not sucked in for all eternity.\nGravity can be though of as a depression/warping of the space time.  Alll object with mass have gravity, so all objects with mass can bend light.  The more mass an object has, the more light bends.  Since black holes have such an exreamly high mass, it can bend light a lot.\nIn fact it is possible for light to be bent into a circle, traveling round and round, never leaving its "orbit" around the black hole.\n\nIf some object located behind the black hole (from the point of view of the observer) is emmitting light at just the right angle, as the ligh nears the black hole, its path is bent so that it can go around the black hole.  This is known as a gravitational lens.\nThis phenomenon is not exclusive the black holes, our sun can even do this with noticible effects.  I belive one of the experiemnts used to verify the acuracy of the theort of relativity was to calciulate the "actual" position of Mercury compared to where we saw it in the sky.  Since Mercury is so close to the sun, just as it goes around the far side, the light was able to bend enough so that we could see it longer than we should have been able to.
636436
As much as Sci-Fi wants it to be something exotic, I'm afraid there is no "other side" to a black hole.\n\nImagine an atom of normal matter. Most of it is empty space. But it takes a great deal of pressure to compress it --- more pressure than is usually available. But if we concnetrate enough mass, the gravitational force will be strong enough that the space can be compressed. Protons (positive charge) and electrons (negative charge) will be pressed together to form neutrons (neutral charge). This happens in the core of very large stars at the end of their life. Their last stage of fusion produced iron at the core. When enough iron exist at the core, it suddenly collapses as I've described here. It then forms what is called a neutron star. If it is oriented just right with respect to the earth, it also appears as a pulsar (Internet search: pulsar +star +radio).\n\nThe neutron star is extremely dense. But there is still a force exerted by the neutrons which keeps the compression from going any further. But what if the mass was large enough to overcome that force and squeeze it even smaller. It appears that once this happens, there is nothing left to stop the compression and it continues until the object takes up no space at all, which is why it is sometimes called a singularity. It is a point in space with a huge mass and therefore extremely strong gravity.\n\nAll objects exert a gravitational pull on other objects. And therefore all distort space and bend the path that light takes. But this new object is so compressed that near it, the gravity is so strong that the path of light beams are looped back and cannot leave the object. Since no light can escape from it and anything nearby falls into it and disappears, it is called a black hole.\n\nMoving out from the black hole, we finally find a distance where light can barely escape. The line that divides where light can and cannot escape from the black hole is called the event horizon. It is not a "surface" of the black hole as there is nothing there. It is merely the distance at which the gravity drops enough that light can escape. If you could build a camera and drop it though the event horizon, nothing would change as it went through. No difference would be recorded. However the radio transmission from the camera would cease as radio is the same as light, just a different frequency. Once the camera went past the event horizon, it would no longer be able to transmit the pictures to you. The radio waves would loop back and head into the black hole. There are also some strange things that happen to time as you cross the even horizon, but you can run an Internet search to find out more.\n\nBecause it has compressed to the point of not taking up space, conventional physics expressions for matter no longer make sense in this environment. You end up with fractions where the volume or distance is in the denominator (lower half of the fraction) and therefore the fraction has an infinite value --- which doesn't make sense. So we can't really project what is going on inside. But the idea that it is a portal to other dimensions is more SciFi than science. There are some esoteric theories that guess about such things, but they are guesses. \n\nHope this helps\n\nIf you are interested in astronomy, try \nhttp://groups.yahoo.com/group/lunar-observing/\n\nChuck
242119
First, you it is better to say that the two black holes have the same mass. in such case (or in other cases also) they will begin to gravitate each other by the power of gravity, because according to Isaac Newton any mass is affected by any other mass in the universe.\nwhen they gravitate each other, they begin to orbit each other in a complex way untill they merge with each other forming a new black hole with an event horizon more then the combined primitive two (according to Stephen Hawking).
408054
This is not a cheap answer because this is a fact: No one knows yet where black holes lead to. Science has not yet found an answer to your question. \n\nIf you want more info on black holes, visit www.nasa.gov
179214
The two black holes will eventually merge, producing gravity waves which we should be able to observe in the near future with planned spaceborne technology like the laser interferometer NASA plans to watch.  In fact, they might have already launched it; I don't keep up with all the projects.\n\n\nSee "Two supermassive black holes found in same galaxy" at the link below.
1171217
hmmmmm\na chirstian in a black hole wielding a black hole\n\nha ha ha
762962
no, but i can tell you what we think it is:\n\nit is a star whose gravity is too great for the nuclear fusion in its core to negate.  it collapses in on itself and goes supernova.  then it is a neutron star.  if the gravity is still too great, it collapses some more and becomes a black hole.  its gravity is so strong that light itself cannot escape it (thus it is 'black').  they are suspected to be at the center of many galaxies, especially quasars and other active galaxies.  one is believed to be at the center of our own galaxy, the milky way.\n\nonce again, no one has really seen one, just the indirect evidence that one exists (strange star orbits, gas being sucked into nothing, strange bursts of some kind of rays (can't remember what kind) coming out of the poles, etc.\n\neverybody is pretty convinced that they exist.  its just kinda hard to prove.\n\nps the idiot down there who said black holes are dead galaxies has no clue what he is talking about. please ignore him.  and its not the size of an atom, its an infinitely small point, the swartzchild point.
944482
The acceleration due to gravity of a black hole depends on the mass of the black hole.  Each black hole has its own mass, and this determines the strength of gravity at a given distance.  It is a bit inaccurate to say that "the gravitational pull is greater than the speed of light."  It is better to say that the escape velocity is greater than the speed of light, within a certain radius called the event horizon.
784181
"...Does the black hole continue to increase in mass and increase the gravitational affect?..."\nWe haven't been studying black holes long enough yet to determine if their mass does increase from all the material being drawn in. Theoretically it would.\n\n"...does all that stuff get shot out in another direction?..."\nExactly what happens to material that disappears beyond the event horizon of black holes isn't known for sure because there's no way science can observe what goes on there. A few speculations persist about so-called  'white holes,' the drain of black holes where everything re-appears in another universe or dimension.\n\n"...Do black holes ever die? And if so, what happens to them?..."\nAgain, science doesn't know because the observational evidence just isn't there. However, Stephen Hawking has developed a workable theory showing that over great lengths of time black holes can actually radiate some of their energy and in time would evaporate.
539666
People die at a certain level of gravity. The gravity of a black hole would way exceed this level. a person would DIE if they tried to land on JUPITER, the gravity would be so much that they wouldn't be able to move to expand they're chests to breath, they'd be so heavy.