Is there such a thing as a "Black Hole Sun"? If so......what, where, when, how, why?
450405
The Sun is a Star therefore what Soundgarden means is a Black Hole Star.\n\nIf you compressed the Sun to a radius of three kilometers, about four millionths of its present size, it would become a black hole. As the mass inside the given region of space increases, its gravity becomes stronger — or, in the language of relativity, the space around it becomes increasingly deformed. Eventually gravity gets so strong that nothing can escape; an event horizon is formed, and matter and energy must inevitably collapse into a singularity.\n\nIn short.\nThere are many black holes out there and the were once stars, or suns.\n\nLike a worm sometimes turns to Butterfly and Star or Sun sometimes turns to Black Hole.\n\nI hope this helps.\n\nIf you are interested in how Black Holes are formed I suggest you to read about Supernovas.
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.
473304
This is a very intriguing question which I plan on researching. I have a conception of light and its physical properties and also the tremendous mysteries of a 'Black Hole'Where current day Physics is just beginning to grasp.NOTHING escapes the gravity of a 'Black Hole',not even light!Through the efforts  of dilligent astronomers, one was actually 'seen' and filmed as it passed in front of a known group of stars...outlining the very hole itself.(like passing an object in front of a bright light source and observing the outline of the object...i.e. Solar eclipse...,) knowing of there existence and how to track them now ,has given a whole new meaning to the destructive forces of a 'Black Hole' as it swallows up Stars, that Dwarf our Sun in comparrison,and the Solar System it may support.This is Truly Dark Matter on the 'Anti' side...Anti-matter...a Black Hole is given birth by a Star,such as our Sun, that is dying.As this Star,once a source of Light that supported a probable solar system, goes through its Final death throws it eventually explodes, but it just doesnt explode! as its  surface layers are  blasted outwards, its  core is smashed inwards. The center of the star  collapses in on itself. Billions upon Billions of tons of Star stuff crushed smaller and smaller until the whole Star is squeezed to a microscopic point,and from the remains of the dying Star, ....a BLACK HOLE is born....in our Galaxy,the Milky Way, a Massive Star explodes and creates another black hole every 1000 years. There is a estimated 10 Million Black Holes roaming our Glaxy today, creating Havoc sucking matter in around them... NOTHING escapes! As we know, anything of SUBSTANCE has mass, microscopic as well as Galatic.Once realized that the incredible forces hatched by a black hole having the ability to bend light and distort the Space/Time continuum which in itself is invisible to the eye, is it a possibility that this very same process is taking place at a molecular level? If manipulated correctly, is 'Cloaking' a possibility? your Question is very intriguing indeed!
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.
1019775
LAYMAN'S THEORY\n\nBlack holes are objects so massive and compact that no physical body or signal—not even light—can escape from their gravitational pull once it has crossed the so-called "event horizon" around the black hole (for a black hole of the mass of our sun the event horizon would have a radius of just 3 km, hence black holes are comparably small objects in astronomical terms). Besides the frequent stellar mass black holes (which are thought to be generated at the death of stars about 10 times or more massive than our sun) there is a second class of black holes, which reside in the centers of almost all galaxies and are a million to billion times as massive as our sun. Such so-called supermassive black holes are thought to be the central engine of "Quasars," the most distant and luminous objects known in the universe. Their electromagnetic emission is thought to arise when gas heats up to temperatures of million of degrees before falling beyond the event horizon of a supermassive black hole. In order to find evidence for the existence of such objects, one has to show that so much matter is concentrated in such a small volume that all alternatives to black hole can be excluded—e.g., dense clusters of dark astrophysical bodies such as planets, neutron stars, etc. This is a difficult task in extragalactic systems because of their incredibly large distance. The center of our home galaxy, the Milky Way, however, is about 100 times closer than our next major neighbour galaxy, the Andromeda galaxy. Therefore the undertaking of finding strong direct evidence for the existence of supermassive black holes is most easily done in the Milky Way. For probing the gravitational field at the center of the Milky Way one can use stars as test particles. Imagine the following scenario: If our sun did not give off any light, we would still know of its existence because the gravitational pull of the Sun (along with the angular momentum of the Earth) makes our home planet move around it once a year. In a similar way we have observed the movements of stars close to the supposed supermassive black hole, called Sagittarius A*, in the center of our Milky Way for over a decade. A star was found that moves around Sagittarius A* once every 15 years. By inferring the properties of its orbit with the help of Kepler's laws it was straightforward to show that the (dark) object that forces the star onto its orbit must have about 3.5 million times as much mass as our sun. Furthermore, this mass must be concentrated into a volume just about three times as large as our solar system. Since there is no other known physical object with these properties that can be stable over a significant length of time (compared to the lifetime of our galaxy of about 10 billion years) we concluded that the Sagittarius A* is indeed a supermassive black hole.
761120
try this   http://uk.wrs.yahoo.com/_ylt=A0geuljFJktF2mIBr3FLBQx.;_ylu=X3oDMTE5ZTFiZDM5BGNvbG8DZQRsA1dTMQRwb3MDMQRzZWMDc3IEdnRpZANVSzAyNTVfMjU1/SIG=123f2f7rt/EXP=1162639429/**http%3A//curious.astro.cornell.edu/blackholes.php
286980
Black holes do not give off any light, so they can't be seen directly.\n\nWhat we can see is the EFFECT of the black hole.  \n\nOne effect is caused by the fact that massive objects will bend light as it passes them - this is called "Gravitational Lensing".  \n\nAs a result, if we detect light from a distant star that is distorted in the specific pattern of gravitational lensing, we can deduce that there is a dark, massive object at the center of the distortion.\n\nAnother effect is produced when matter that is pulled into the black hole.  Once matter or light gets closer to a black hole than the critical distance (the "event horizon") it vanishes into the black hole and is never seen again.  But, matter NEAR the black hole that is falling into it will give off light or other radiation as it is destroyed by the black holes gravitational force.  This radiation includes bursts of X-rays, which we can detect.\n\nThe first black hole that was detected is called Cygnus X-1 (it is an X-ray source in the constellation of Cygnus, the swan).
410940
Our Sun's mass isn't great enough to create a black hole, but speaking in a hypothetical situation it would suck everything into including the planets and so forth because its gravitational pull is so great.  However, recent astronomical studies have proven using a spectrometer and examining the data produced by it the stars in almost every single galaxy are moving at a rate which only indicates the presence of a super massive black hole in almost every single galaxy.  The size of the black hole is dependent upon the galaxies size and is directly related to its sigma, but these black holes are present in almost every galaxy we have viewed, including our own and are currently not feeding anymore and are dormant.  They believe that they helped form the galaxy in some way but it is not known yet.  So maybe it is possible if the Sun created a black hole it would feed to the point that it also became dormant, probably not though.
378154
It is not a star going supernova that creates a blackhole. Its the collapsing of its core that does. Just wanted to clear that up.\n\nA blackhole is created when a star is so massive (at least 20 times that of our Sun) that the bonds between the atoms, or molecules, are no longer strong enough to fight against the force of gravity.  This causes the star to collapse in on itself, and eventualy create a blackhole.\n\nThere are some beliefs that a blackhole could lead to a parallel universe.  But this gets a bit hazy in details, as no one knows for sure, and its currently impossible to prove or disprove.  A blackhole has an "event horizon", that once you have passed through you cannot get back out, nor can you see past it from the outside.  Because of this event horizon, it is very unlikely that you could get out of the blackhole into another universe .....\n\nHowever ..... A theoretical astronomical body called a white hole has been predicted, although its existence has not yet been proved.  It is the opposite of a blackhole, in that instead of "sucking" up all the matter in its path, it spews it out instead.  IF this exists, then there is a chance that a white-black hole pair could be a gateway to another universe, or another part of our universe.  But I can't stress enough, this is purely theoretical, and absolutely NO proof has been found yet.
920733
Steven Hawking has recently changed his view that no "information" could escape a black hole.  Current thinking is that as matter falls into a black hole, some radiation / information escapes across the event horizon.  So according to current thinking black holes are not completely "black"
49210
Black Holes are strongly suspected to be responsible for a few powerful X-ray stars, and also to be at the center of most Galaxies - including ours.\n\nBut, while these are all much to far away for us to get to now - probably ever. You can see what the trip would be like with the Virtual Trips to Black Holes and Neutron Stars web page:\nhttp://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html\nand with the animations on the Falling into a Black Hole page:\nhttp://casa.colorado.edu/~ajsh/schw.shtml
1011277
Black hole is not possible because our sun is not the right size.\n\nThe world will "end" (as in, be physically destroyed, not the Coming of Christ one--that is a spiritual issue, not to be confused with science.  And I'm not talking about humanity scr-wing itself over with pollution), with when the sun is dying and starts to increase in size.  Forgot if it's rapid or not, regardless, everything on the surface will be deep-fried like a box of pop corn chicken from KFC before it is engulfed by the sun.\n\nA possibility of a meteor striking us is out there.  Not immediately in our lifetimes--check out NASA's website for close to Earth objects; they keep tabs on this stuff.  I mean, they want their paycheck next week, too.
359590
The short answer is that whenever we take a good hard look at any given galaxy, we find good evidence that there is, or could be, a black hole at it's core.\n\nThe long answer is:\nIt is not so much a theory as something being increasingly noticed. Because black holes are the latest and coolest thing in astronomy (just look how many questions about them appear here!), everyone is always looking for them. They are not so easy to find because, well, they are black. You can't see one directly. One way to tell if there is a black hole there is by the effects of it's gravity on nearby matter. So far, the biggest effect observed on nearby matter has been high energy radiation caused by the rapid acceleration of that matter as it falls into the black hole. Some galaxies show that in their core, indicating a massive black hole there.\nAnother effect is that stars could orbit the black hole, just like the Earth orbits our Sun. We have known for a long time that all stars in a galaxy are orbiting around the center of that galaxy. IN the past it was assumed that there were enough regular stars and dust and gas in the center of the galaxy to make a mass big enough to orbit around. But recently observations with more powerful telescopes of stars closer and closer to the center of our Milky Way galaxy have shown stars VERY close to the center of the galaxy orbiting VERY fast. In that case it is easy to calculate the mass of whatever it is that they are orbiting, just like we can calculate the mass of the Sun by knowing how fast the Earth orbits it. Those calculations show the mass is millions of times more than the sun. Now we know all that mass has to be in an area smaller than the orbits of those stars, and the size of those orbits is measured as being quite small, so we know the volume far too small to be a big star cluster or other ordinary concentration of mass. The only known way to get so much mass in such a small volume is a black hole.\n\nI recall many years ago, when computers were just becoming powerful enough to do big simulations, that someone tried to simulate a globular star cluster by programming a few thousand stars to orbit in a big ball with no mass other than the stars themselves. It didn't work. The stars kind of just all dispersed at random and did not stay in a nice ball shaped globular cluster. Now it should be obvious that if there was a massive black hole in the center of the globular cluster, then all the stars could orbit it like the planets do the Sun, only not all in one plane like the planets do. And I believe some evidence of medium large black holes has been found in some globular clusters recently by the same method of using powerful telescopes to look at the orbits of stars very close to the core. And after all, what is a globular cluster but a really small galaxy.\n\nSo giant telescopes, some of them is space, are providing data never before available that just makes it more and more reasonable to assume that all galaxies have a massive black hole at the core.
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??!!
241248
try here\nhttp://en.wikipedia.org/wiki/Black_hole
1142803
First off, that a black hole sucks everything around it in is basically a myth.  The pull of a black hole at a distance r>Rhorizon is equal to the pull of any other equally massive spherical object.  So if the sun collapsed into a black hole, ignoring the fact  that it's not nearly massive enough (by a factor of 10), we would still feel the same pull of gravity and remain in the same orbit.  That said, in a quickly rotating black hole, there is an inner horizon where the inescapable fall towards the singularity at  the center of the black hole is halted.  Inside this second horizon space remains spacelike, meaning time travel is possible, unfortunately escape from this inner horizon is impossible because there is still the area between the inner and outer horizon which is one directional and impossible to penetrate.
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..