A black hole is theoretically a puncture in three dimensional space-time. It has no volume, but the gravity from its mass can be felt in three dimensions.The event horizon is the area which the "not even light can escape" gravity is in effect (although the rest of its gravity extends well beyond that)
2007-11-13 03:09:57
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answer #1
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answered by Eli 6
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Gravity can't exist without mass. The gravity well of a black hole is so intense it warps its surrounding space into a tight circle called an even horizon from which not even light can escape. To maintain that such a mass has no dimension is ludicrous, mass requires matter, matter has volume. It has been suggested that a black hole, three miles in diameter, exists at the centre of our galaxy. Such a body is not a hole, it just has the property of being able to swallow what seems to be a limitless amount of matter.
2007-11-13 05:33:57
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answer #2
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answered by johnandeileen2000 7
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A "black hole" is a singularity of such mass that nothing, not even light, can escape it's gravity hence the blackness.
There is a limit around the star in every direction where the force of it's gravity is such that once you pass that limit there's no way to escape. That's called the "event horizon".
Between the singularity and the event horizon is a large bunch of nothing.
So at the centre it's a single point called a singularity. There's a bunch of nothing all around it in every direction. Eventually it ends at a limit called the event horizon. And there you go, a black hole.
2007-11-13 03:03:59
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answer #3
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answered by JavaJoe 7
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Quantum mechanics might be capable of stripping bare a black hole to reveal the mysterious and unseeable 'singularity' that exists at its heart, say George Matsas and André da Silva of the São Paulo State University in Brazil. It has long been suspected that these singularities "where the known laws of physics break down" are always decorously veiled behind the 'event horizon', a boundary beyond which light cannot escape from the fearsome gravitational pull of a black hole. Theoretically, nothing within an event horizon can ever be perceived or investigated by an outside observer, because no light can escape. So the singularities remain insulated from the rest of the Universe. This amounts to what in 1969 physicist Roger Penrose called 'cosmic censorship', whereby the laws of physics conspire to save us from having to gaze on the unthinkable. According to Einstein's general theory of relativity, in the middle of a black hole, its mass collapses in on itself to form an infinitely small, infinitely dense point, where space-time itself is punctured. Even causality " the relation of a cause and its effect " breaks down, which seems to defy not only physics but logic. "Penrose's motivation seemed to be to preserve the decorum of physics," Matsas says. But physicists have wondered whether event horizons are ever stripped away, leaving these absurdist singularities naked. One possibility, for example, is that the event horizon might vanish if a black hole spins very fast. Light and matter might then be flung out by centrifugal force.
"It is widely believed that quantum gravity will unveil the structure of the singularities."In September, physicists Arlie Petters of Duke University in Durham, North Carolina, and Marcus Werner of the University of Cambridge, UK, proposed that singularities stripped naked by fast rotation should be detectable by astronomers because they act as very strong 'gravitational lenses', bending the light coming from stars behind them by their distortion of space-time.
2007-11-13 08:46:28
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answer #4
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answered by SPACEGUY 7
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We maximum fairly did learn the version between 2 and 3 dimensional shapes. Mathematically, a cube is a sq. extruded into the third measurement. The ancients have been far smarter and greater knowledgeable than maximum provide them credit for. they might see the moon, they might see that the shadows replaced with the time of day and seasons and could in easy terms be available if the earth replaced into no longer a flat airplane. the classic Greek Eratosthenes, born 276 BCE calculated the circumference of the Earth the main properly it were finished till the twentieth century.
2016-12-08 20:32:10
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answer #5
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answered by ? 4
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When a sun collapses it is 3 dimension .
2007-11-13 04:29:13
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answer #6
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answered by JOHNNIE B 7
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Black holes are usually described by their event horizons, which are approximately spherical.
2007-11-13 02:38:23
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answer #7
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answered by ZikZak 6
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I sent someone to find out and damn it he isnt back...
2007-11-13 02:15:28
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answer #8
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answered by Anonymous
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