A black hole conundrum.?
971222
It is not orbital velocity.\n\nIt is the escape velocity. In order for a black hole to exist the diameter of the mass should be less than the diameter at which the escape velocity is C.\n\n Now rewrite your question.
72214
Black holes almost certainly exist. Wormholes almost certainly do not.
849237
There's most likely not an 'other side'.  A black hole is a bunch of matter that's been compressed down into a singularity, or an extremely dense spot.  More stuff falling into the hole isn't going anywhere; it's just contributing to the density of the black hole itself.
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
387898
Black holes are food for my brain and curiosity. I love the subject it is so interesting!\nBackround info: A black hole is a concentration of mass great enough that the force of gravity prevents anything from escaping from it except through quantum tunneling behavior. The gravitational field is so strong that the escape velocity near it exceeds the speed of light. This implies that nothing, not even light, can escape its gravity, hence the word "black." The term "black hole" is widespread, even though it does not refer to a hole in the usual sense, but rather a region of space from which nothing can return. Theoretically, black holes can have any size, from microscopic to near the size of the observable universe.\nBlack holes are predicted by general relativity. According to classical general relativity, neither matter nor information can flow from the interior of a black hole to an outside observer. For example, one cannot bring out any of its mass, or receive a reflection back by shining a light source such as a flashlight, or retrieve any information about the material that has entered the black hole. Quantum mechanical effects may allow matter and energy to radiate from black holes; however, it is thought that the nature of the radiation does not depend on what has fallen into the black hole in the past.\n\nThe existence of black holes in the universe is well supported by astronomical observation, particularly from studying supernovae and X-ray emissions from active galactic nuclei.\nMy answer 1)time travel when you, or in this case an object, goes fast the world goes slow. and if something, a black hole, is going, or sucking, fast enough, the world around you will eventually begin to reverse.
24829
Although black holes are not directly detectable, there is much indirect evidence of their existance such as the movement of other objects.\n\nGravity is not a simple phenomenon and cannot "escape" from anything. It is a property of space-time itself.
312029
As moses said very well indeed, Nobody knows.\nThe major problem I have with a black hole is why it is called a black hole. If this thing is so dense and gravity is so powerful it would be bending light around at the event horizon so that you'd not even know the black hole is there. The other way to confirm this "black hole" would be to observe the planets remaining in the solar system still rotating around a sun which is not there any more. What you would actually confirm would be, according to the laws of gravitational attraction that two massive bodies are attracting each other. One is the planet you see and the other is the "black hole.\nWe know we can change things by sqeezing them, coal into diamonds etc, but there are some materials such as water that are supposed to be incompressible.\nWhat we are supposed to think is the acceleration gradient is so massive that atoms are stripped into their components.\nThe thing is, if the graviation is so massive beyond the event horizon that things are moving at the speed of light.\nThis is a contradiction according to the relativistic E=MC^2 equation.\nIn order for something to travel at the speed of light it must have no mass.\nWe know light has no rest mass.. I.e. stop some light and you get energy but nothing to look at.\nTherefore we are supposed to assume that a massive body changes into pure energy to reach the speed of light and then turn back to mass when it gets to the centre of the black hole.\nThe conclusion there is neither mass nor energy according to the laws of physics currently at the centre of a black hole.
437322
The mathematics of black holes shows that they might be able to transport you to another region of space or possibly another universe. However, the mathematics also shows that the connection only lasts for a fraction of a second at a time, and that the link to other universes depends on a specific set of conditions which scientists do not believe to exist. Even if it were likely, however, the strong gravity field of the black hole tears apart any material falling into the hole so it would not come out the other end of the Black Hole looking anything like how it went in, so in other words you would  have to really want to make this discovery because you’re going to die trying.
414187
Yea, entering a black hole might not be the smartest idea...unless you like being compacted into a space smaller than your fingernail.
36596
That's a big "if", that's some car!\n\nOK, I'll go there:\n\nThe photons in the forward direction could not escape thre filaments so they'd build up there, but the filaments would not blow because they'd be infinite mass.  Boring answer, really.  Nothing would happen.
453304
There are many thoeries to how this process works...we all know that black holes are the decayed from of a supermassive star.  Technically the universe would have to all collapse before it could expand...like a star it has massivle amouts of atomic energy, and non atomic...al matter was inside this small, infinitely dense space.  Then, the big bang appeared and everything expaned.  My personal theory or space time is that there is no limate to space therefore there is no limit in time...there is no beginning or end to either becaus they are related to each other and mush remain at a simimal or equal constant.  Thus everything within time has a finite length.  The events in time will end, but not time itself.  There is a lot to all of these theories.  Anyways the point to this is that there is a center to the universe but not space.  Anything that is a mass has some ammount of gravity...some, though have more energy than others.  This is what makes a black hole.  the things in a black hole are packed into an infinitely small space.  Then hydrogen plasma shoots out of some supermassive blackholes.  this energy still remains a mysterty to me on how it can escape the black hole, almost like the big bang, but more controlled.  there WAS a mass at the center of everything, but how that works still is a mystery.  I think that there were once supersupermassive aters where the center of our calaxy is today.  this explain the expansion of out galaxy and the surrounding stars and such.  So there was once a biis mass that keeps dividing till it smaller.  Sadly at the end of our universe, everything will once again be absorbed.  That last part is my thoery.  But can we survive?  Well I hope I answered you're question thurough enough.  My hands are kinda tired.\n\nBTW...does the stuff I said too confusing or does it work..I'm not exaclty the sharpest when it comes to these things but I'm pretty sure I know what I'm talking about?
403857
yes, black holes really exit.\n\nhttp://en.wikipedia.org/wiki/Black_hole
1160171
its a MATHIMATICAL prediction that warmholes (or "shortcuts" in spacetime... so you fly into black hole and boom you're in another part of the universe or another universe all together) exists\n\nUnfortunatly this prediction bares no physical merrit as neither the black hole is capable of "letting things fall through" nor is a "whitehole" capable of existing for more then one instance (aside the fact that it cannot form, period)\n\nThe mathematical model is beautiful though, if you know much math I suggest you check it out.!
230892
...a black hole is it is not really a hole...you should be able to go behind it, in front of it, and so on...for example leading scientist know think that the center of our galaxy is a black hole...now you can see that there is something on the otherside of it...the galaxy is not cut in half with us only waiting for our end...it is simply a piont in space in with nothing can escape (check first reference)\n\nthe word "black hole" was coined by scienctist john wheeller (sorce #2)...it was basically science shorthand...then hollywood got a hold of the name and behold...people now think there is someting on the other side...some magical land were unicorns and wizards breath\n\na black hole is what left after a star at least 10x the size of our sun uses all the energy ...after which the star goes super nova, then it becames a black hole (#3)...\n\nlong story made short...what is behind a black hole...most likely another star...then another...then another\n\nwhat would happen if  you tried to go trough a black hole...you would be crushed and then you would die
1158151
you're thinking of a worm hole. a black hole will, as far as we know tear things apart to as it takes them to a different part of our universe, which doesnt make sense because nothing can escape from them. Anyway, a worm hole, which is theoretical -mostly- is like two black holes connected at their vertex's. think of the universe as a thin sheet of paper. one black hole is is on the right side, and another on the left. fold the piece of paper so that the black holes are lines up. instead of traveling from point A to point B, you just go through space in manner of speaking from point A to point B "just like that". there really isnt any just like that, but that's as best i can describe it with out actually showing you. sorry if this makes no sense.
1098294
no. The definition of black hole is that what comes in, never comes out anymore.\n\n"What goes in must come out?" is a saying, not a law of physics
1166146
Yes........more or less. A Black hole is a small view of what the universe as a whole will be like billions of years from now.