Since our universe has a black hole in hte middle does that mean that there used to ba a star or planet there?
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?
1138674
A star is stationary object and a black hole is a result of dying star. Black holes are stationary objects.\nThey posses a great gravitational force. It is so great that it can even suck in light.\nDue to such gravitational force it makes objects near it to revolve around it with tremendous speed.\n\nThe closest black hole to earth lies just 1,600 light-years \n(1 light year = 9.4605284 × 10^15 meters ) from Earth on the way to the centre of the Milky Way in the direction of the constellation Sagittarius.\n\nBut if you want to test the above facts and experience it yourself then just wait till sun becomes one black hole!!!! (after around 5-6 billion years)  (Sun can also become neutron star or nebula so may be you cannot experience it!!)
533667
Black holes are not holes at all.  These do not have any bearing on other universes.  They are just extremely massive objects that have collapsed within the Schwarschild radius and into a single point, which creates an area in space in which light could not escape if it gets so close.  \n\nAs for other universes, according to string theory we exist in a 3 dimensional subspace of a 13 dimensional universe.  Since we only occupy 3 dimensions, there could be other multi-dimensional subspaces which could affect our universe.  In fact, one theory of the big bang is that gravity from another universe and our own had caused them to touch, which concentrated energy in a single region, since energy is subject to gravity.  After this touching, the two universes went apart, and caused this energy to expand and 'cool' into matter that we know as our own universe.
515493
The galaxy is everything you see at night when you look up in the sky. Stars, planets, moons, asteroids, meteors, comets, or any other terrestrial body. I think there's just one black hole at the middle of the galaxy.
17
The current scientific theory holds that black holes are formed when stars of sufficient mass (about 3x the mass of our Sun) reach the end of their life and collapse down into a singularity, which is, in essence, an infinitely small point with a huge amount of gravity - gravity so powerful that not even light can escape it's pull if it gets too close. It is also thought that black holes can be formed from smaller masses if external energy/pressure is exerted to squeeze the mass into a singularity.\nNot sure if there's any direct experimental evidence of creation, but there is evidence that they exist. Cosmologists use several different methods to detect blacks holes, such as by looking for light being bent and/or disappearing as it travels from remote stars towards us, and also by looking for bursts of x-rays that are given off as matter is sucked into the back hole and destroyed.\nFun fact: current evidence and theory suggests that the center of the Milky Way is a giant black hole that was formed as the densly packed stars in the center collapsed and sucked each other in.
445478
It is called a QUAsi-StellAR Object or quasar.\n\nNowadays they are generally believed to be galactic cores with enormous black holes at their center.\n\nIt appears starlike (quasi-stellar) but is actually very different in size and what it's made of.
712417
"Singularity\nAt the center of the black hole, well inside the event horizon, general relativity predicts a singularity, a place where the curvature of spacetime becomes infinite and gravitational forces become infinitely strong.\n\nIt is expected that future refinements or generalisations of general relativity (in particular quantum gravity) will change what is thought about the nature of black hole interiors. Most theorists interpret the mathematical singularity of the equations as indicating that the current theory is not complete, and that new phenomena must come into play as one approaches the singularity.[15]\n\nThe cosmic censorship hypothesis asserts that there are no naked singularities in general relativity. This hypothesis is that every singularity is hidden behind an event horizon and cannot be probed. Whether this hypothesis is true remains an active area of theoretical research"
265923
Yes. The universe is constantly expanding. It is possible we are all being sucked into a massive black hole, far far outside the reaches of our universe which would account for the the expansion of our universe. Additionally, the best competing theory for the start of the universe is the big bang , where everything expands out of one tiny point. It is reasonable to think that the universe could end in the opposite way - The Big Suck, where we get pulled into a massive black hole, just like the one you describe. So yes, I think it's very possible.
209863
according to a theory of big bang, there is a black hole at the centre of our galaxy that exerts such a huge pull of gravitatinal force on things towards it that even light  pulled towards it never traces back or is never reflected agin. isn't that amazing!
943441
Hey, I'm gonna give you the truth instead of spilling abunch of theories at you. \n\nNobody knows. Black holes and everything related to them are one of the most mysterious things out there. Not that we REALLY know much else about whats going on out there. Everything so far is based on theories drawn from basic laws of physics. \n\nWho knows, maybe you and I will live to see the day they can tell us it is a fact. I hope so, there are many questions I would like to know the answers to. =)\n\nEDIT: Bill, I believe the theory I last heard on that is as follows: \n\nOnce a black hole has nothing else to 'feed' on it will collapse. Scientist recently believed that the end of the universe was gonna be in a black hole, a super massive black hole, that was thought to be in the location of where the Big Bang took place. They assumed that the universe would quit expanding and retract on itself. They recently found out that they were COMPLETELY wrong in that assumption. In fact, the universe is expanding at a faster rate then it originally was. Their new theory is that the universe will continue to expand, eventually breaking down everything in the universe (sun, moons, and planets encluded). True? Couldn't tell you honestly, they may come up with a different theory tomorrow.
123160
Yes!\n\nOur galaxy is rotating, in the sense that all the stars are in orbits around a common center, which happens to have a big black hole. Because the distribution of mass in something like a galaxy is different from a solar system, these orbits are not simple ellipses.\n\nIt takes the sun (and the rest of the solar system) about 250 million years to make it all the way around.\n\nOur Galaxy is also interacting with other galaxies, in particular with the Andromeda Galaxy which is, relatively speaking, close by.\n\nIn fact, our Galaxy and Andromeda are headed for a collision in about, oh, a few billion years. However the distance between stars in a galaxy is such that there will be fewm if any, star-star collisons.
784467
The center of our galaxy is obscured by dust and celestial bodies in visible light.\n   Longer wave lengths , infrared and radio waves give an unfocused view of the center.\n   The cosensus is that a massive black hole inhabits the center.\n   Astronomers have reasoned the existance of the black hole by the unusual movement of stars in that area.\n   Thier reasoning is quite persuasive but several points belie this reasoning.\n   The stars orbit the black hole in highly elliptical orbits slingshoting out at incredible speed.\n   A star is a sturdy entity in its place but would be very fragile and vulnerable racing past  a black hole.[Remember, some years ago,the comet that crashed into Jupiter,it landed in pieces because of the tidal forces on its last trajectory, broke it up]\n   These stars that seem to race past a black hole would shed most,if not all their mass and would not complete the orbit.\n   Then what is at the center of our galaxy? This may take some inovation,but it is not a black hole because black holes are nonviable entities.\n  They would be anamolies among celestial bodies.No upper limit to their size.\n   The surface would trap light at "C".THe quantum effect would allow a small percentage of photons to spiral outward.producing a slight glow in white light.\n   Anything that penetrated the event horizon would have to exceed "C"[Time dilation notwithstanding]\n   This would leave the other end of the quantum effect with slower than "C"photons,that could not spiral out could not spiral in and could not maintain orbit!\n   So what the heck is at the center of our galaxy??\n   The answer may depend on the question;What the heck happens to a neutron star if black holes do not exist??!!
274083
No.  A black hole is an immensely dense object, like taking all the matter in our solar system plus more, and condensing it to the size of a pea or so.  The moment we could "create" one, the entire earth would be "sucked into" it.
697469
it can be. Because blackhole has a much faster velocity than light. It is possible that we can use blackhole to travel into another galaxy or another space that we haven't know before. Or maybe we can use blackhole as a time machine. Everything can happen, one day we can find it out. I believe that
558467
Is our universe in another universe?  \n\nBefore we can address that question, we must first define universe.  \n\nThe word universe denotes all space and everything (matter, energy) contained within it.  The prefix uni means one.  The root verse means word, carnate message, meaningful substance, matter.  Questions regarding our universe persist today.  Does it have a beginning and end, or does it go on forever and ever?  Is it linear or curved?  If it has limits of length or curvature, then what lies beyond the Universe?  If something lies beyond the Universe, then can’t we accurately call that the Universe?\n\nSome lay people and some scientists conceive of the universe as infinite space.  Others define the universe as finite, or limited (perhaps curved), space.  Still others incorporate the elements of matter and/or energy into their definition of the universe, as opposed to the space beyond matter and energy.\n\nGiven these concepts of our universe, some scientists conclude that the “totality of space could be infinite. Shrink an infinite space by an arbitrary amount, and it is still infinite. (Scientific American March 2005).”  \n\nAs to the notion that we live in an ever expanding universe, moving away from every other universe on the fabric of space-time, some scientists are careful to point out that “\nAndromeda, our nearest large galactic neighbor, is actually moving toward us, not away. Such exceptions arise because Hubble's law describes only the average behavior of galaxies (Scientific American March 2005).”\n\nIn accordance with your supposition that our universe is in another universe, “it has been hypothesized by some scientists that the universe may be part of a system of many other universes, known as the multiverse (http://en.wikipedia.org/wiki/Universe).” Modern astrophysicists talk about multiple "pocket" universes that branch off from one another.  Stephen Hawking points out that parallel pocket universes can have no effect on a real observer inside a single pocket, so, according to Hawking, they are theoretical baggage that should be eliminated from cosmology, the study of the origins of the universe.\n\nSome string theories define the universe as a three-dimensional space in an invisible space having more dimensions. This is, in essence, a universe within a universe.  Our zone, a “braneworld” could periodically bounce into another parallel braneworld.  This may create what would appear as a Big Bang from one perspective or a Big Bounce of alternating expanding and contracting universe from another perspective.  Such a cataclysmic event is thought to occur 300 billion years from now, resulting in the rearranging and creation of a new universe.\n\nIs our universe inside another universe?  Well, apparently the Men in Black had it right.  Our universe seems to be inside of something else, another universe, called the multiverse.\n\nSteve\n:-D
190845
I believe there are two kinds of black holes. One I'm sure everyone will explain to ya, a great mass so large that light can't even escape it's gravity. But the other kind is theoretical: What if everything in THIS universe came from somewhere else? That is the only way I can explain it, except that somehow we are all headed for it again, to be sucked into it and expel ed into another place which right now is completely void, and this universe would be turned inside-out again.
767654
that's one theory.a black hole was the result of the big bang in every universe.it eventually swallowed other black holes to expand the universe.every known universe has a black hole in the center.if they become active they could destroy the universes around them as well as the universe they reside in.this would include our own universe.