what are the harmful effects of a black hole?? contact samhattangady@yahoo.com.?
358053
Intense gravity. It just sucks everything nearby up. If you went into a black hole gravity would be stronger at your feet than at your head. You sould be stretched out like a piece of spaghetti and broken in two. Then the same thing would happen to the pieces of you. The bottom of the pieces would break off untill you're just a bunch of little tiny pieces.
224794
DARK energy and dark matter, two of the greatest mysteries confronting physicists, may be two sides of the same coin. A new and as yet undiscovered kind of star could explain both phenomena and, in turn, remove black holes from the lexicon of cosmology.\n\nThe audacious idea comes from George Chapline, a physicist at Lawrence Livermore National Laboratory in California, and Nobel laureate Robert Laughlin of Stanford University and their colleagues. Last week at the 22nd Pacific Coast Gravity Meeting in Santa Barbara, California, Chapline suggested that the objects that till now have been thought of as black holes could in fact be dead stars that form as a result of an obscure quantum phenomenon. These stars could explain both dark energy and dark matter.\n\nThis radical suggestion would get round some fundamental problems posed by the existence of black holes. One such problem arises from the idea that once matter crosses a black hole's event horizon - the point beyond which not even light can escape - it will be destroyed by the space-time "singularity" at the centre of the black hole. Because information about the matter is lost forever, this conflicts with the laws of quantum mechanics, which state that information can never disappear from the universe.\n\nAnother problem is that light from an object falling into a black hole is stretched so dramatically by the immense gravity there that observers outside will see time freeze: the object will appear to sit at the event horizon for ever. This freezing of time also violates quantum mechanics. "People have been vaguely uncomfortable about these problems for a while, but they figured they'd get solved someday," says Chapline. "But that hasn't happened and I'm sure when historians look back, they'll wonder why people didn't question these contradictions."\n\n“People have been uneasy about these problems with black holes, but figured they'd get solved. That hasn't happened”While looking for ways to avoid these physical paradoxes, Chapline and Laughlin found some answers in an unrelated phenomenon: the bizarre behaviour of superconducting crystals as they go through something called "quantum critical phase transition" (New Scientist, 28 January, p 40). During this transition, the spin of the electrons in the crystals is predicted to fluctuate wildly, but this prediction is not borne out by observation. Instead, the fluctuations appear to slow down, and even become still, as if time itself has slowed down.\n\n"That was when we had our epiphany," Chapline says. He and Laughlin realised that if a quantum critical phase transition happened on the surface of a star, it would slow down time and the surface would behave just like a black hole's event horizon. Quantum mechanics would not be violated because in this scenario time would never freeze entirely. "We start with effects actually seen in the lab, which I think gives it more credibility than black holes," says Chapline.\n\nWith this idea in mind, they - along with Emil Mottola at the Los Alamos National Laboratory in New Mexico, Pawel Mazur of the University of South Carolina in Columbia and colleagues - analysed the collapse of massive stars in a way that did not allow any violation of quantum mechanics. Sure enough, in place of black holes their analysis predicts a phase transition that creates a thin quantum critical shell. The size of this shell is determined by the star's mass and, crucially, does not contain a space-time singularity. Instead, the shell contains a vacuum, just like the energy-containing vacuum of free space. As the star's mass collapses through the shell, it is converted to energy that contributes to the energy of the vacuum.\n\nThe team's calculations show that the vacuum energy inside the shell has a powerful anti-gravity effect, just like the dark energy that appears to be causing the expansion o
1162679
There is one, that if you were to do it and found a way to publish the results, a lot of common people would be very interested.  It is the formation and collapse of a gravitational field.\n\nWere you to go to http://timebones.blogspot.com   and then to the November Archive, toward the bottom of that month you shall find "How to Form and Collapse a Gravitational Field".  What I have suggested has been done by myself, but I have never found anyone interested in the results.
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).
38830
a black hole is a point of infinite density and gravitational pull. First of all you would be dead from different gravitational pulls from the black hole. Second of all, time from your perspective would stop, assuming that einstein is correct and your image would be spread out over an infinite period of time so your friend would see nothing.
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
1145852
Nothing; the "hole" in space isn't like a hole in your shirt, but rather like a giant pit.  What falls in stays in (of course, this is a three-dimensional hole that sucks stuff in from all directions, but we'll stick with the hole-in-the-ground analogy for simplicity)\n\nWhat has been discovered mathematically by people like Hawking and Chandrasekhar is that black holes actually do give off radiation (so-called Hawking radiation) through its effects on local space-time right at the event horizon.  At this specific region of space, charged pairs of virtual particles appear, and every now and then, rather than rejoining and annihilating each other in a tiny flash of light, one particle escapes and goes flying off away from the black hole while the other gets drawn in.  The escaping particle is considered matter, while the one getting drawn in becomes antimatter.  As the antimatter reaches the center of the black hole, it cancels an equal mass of matter and the black hole gets infinitessimally smaller.  An old black hole (one that has consumed all the matter in its vicinity) therefore gradually "evaporates" over a VERY LONG TIME (about 10^61 times the age of the Universe for a 30 solar mass black hole!) until its mass is so small that its gravity is no longer strong enough to hold in light, and it may do any number of things -- explode, fade out and become a really big hunk of red-hot metallic stuff, sit and remain a giant, dark gravity well... depends on what kind of math you like and the current theories at the time you calculate it.
414187
Yea, entering a black hole might not be the smartest idea...unless you like being compacted into a space smaller than your fingernail.
532399
Anti-matter is real and produced in particle accelerators all the time. Other types of anti-matter are produced in cosmic rays.\n\nAs for collision with a black hole, everything depends on the mass of the black hole and what, exactly it is colliding with.  The way a black hole affects things is through gravity. If the black hole was about a solar mass or two (a small one) and didn't directly collide with any of the planets, the main effect would be to change the orbits of the planets as the black hole goes by. The gravitational field would be *identical* to that of a star of the same mass once you are far enough away from the black hole (a few million miles would be plenty).\n\nThe a black hole the mass of the sun actually hit a planet (an unlikely scenario since the black hole would only be a couple miles across), there would be a huge burst of gamma rays from the planet's mass going into the black hole. If there were enough gamma rays, that might make things unpleasant on earth even if the balck hole didn't hit the earth itself.\n\nA large black hole (a hundred solar masses or larger) that went through the solar system would significantly affect the orbits of all the planets, the ones that were closer being affected more, possible being thrown out of the solar system. An actual hit on a planet would have similar effects as described above.\n\nA microscopic black hole (say of a mass close to that of the earth) would not affect anything much unless it actually hit a planet. In that case, there would be a burst of gamma rays when it hit, but the planet would not necessarily be totally destroyed. if it wasn't, it would probably be in a very different orbit afterwards (unless it hit Jupiter, which is massive enough the orbit wouldn't change all that much). \n\nIn all cases, the particulars of how close the black hole goes to which solar system object is crucial to determine what the effects are. The size of the black hole is also crucial. Even an earth sized black hole directly hitting the sun would not have much effect if it came from above the plane of the planets. It would put on a good show and then continue its journey through space.
1168078
we'd become a black hole. ooh nooo
1169308
It's a planet.  Planets are too small to be blackholes.  I will ignore the second part of your question.
724210
something like what we call a "black hole"
1095953
There are no black holes close enough for a terrestrial probe to reach them yet. According to current theory, the intense gravitational field would trap any electromagnetic signal the probe might be sending out after it crossed the event horizon, so we wouldn't know what happened in any event.
164275
I've not heard of this, but the biggest explosion since Big Bang? Sounds very exaggurated in my opinion. There was however an article about a large star exploding and turning into a black hole that was observed.\n\nThe last link I think talks about your event. The middle one is just interesting if you wonder about them in general.
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"
520554
Small black holes disappear in a puff of Hawking radiation, pretty rapidly.\n\nThey don't really need containment. They just evapourate into thermal radiation.  It's only the dirty great big ones that could smash the place up.  Making one of these on earth is just not feasible.  The ones that occur naturally in the universe are rather a long way off.\n\nNothing to worry about.
459083
God dammit!\n\nGet over it.  :)\n\nQuestions?  Comments?  Concerns?  Email me through the link in my profile, and I'll get back to you as soon as possible.