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Black holes
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by
on 2008-01-22 22:15:02 |
I am very curious in black holes, how it is formed, what characteristics it has and what it can do. I read a couple of articles online, but having problems understanding it. Please explain. lol 
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Re: Black holes
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by
on 2008-01-22 22:18:55 (edited 2008-01-22 22:33:40)
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A black hole is a region wherein the curvature of space-time is infinite. Space curves in the presence of matter. In the cosmos, black holes are formed by the collapse of super-massive stars, and also at the center of galaxies. There are many interesting characteristics of black holes. I highly recommend you read Death by Black Hole by Neil deGrasse Tyson. He's good. To really understand black holes, you will have to understand Einstein's theory of relativity. This is not an easy subject to comprehend, but I encourage you to give it a try. See also: http://gendou.com/forum/thread.php?thr=1838 http://en.wikipedia.org/wiki/Black_Hole 
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Re: Black holes
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by
on 2008-01-31 01:42:49 (edited 2008-01-31 11:38:23)
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[EDIT] i've read the rules, and it stated that plaigiarism should never be committed. but apparently, the book, which was copyrighted in 1997, noted no links of the author nor the publication (Hodder Children's Books) in any page of the book. according to a book that i have entitled "What's the Big Idea: Time and the Universe" by Mary And and John Gribbin: Black hole is an object where gravity is so strong that nothing cab escape, not even light. so, according to he actual words of the book (which i just copied and typed), time travel is possible whenever you enter a black hole. but apparently, according to the book itself, a very great mechanism should be built in order for this time travel to be possible, and for now that mechanism is impossible to be built.Black holes are almost self-contained bubbles of spacetime, but they are connectedto our universe by the hole itself - a kind of throat, which swallows anything that comes near the hole. Anything that falls in it is crushed by gravity. it is squezed into a mathematical point, with no volume at all, at the centre of the hole. the laws of physics say that black holes really could be the entrances to cosmic subways. but space is only one part of spacetime.a hole through space is really a hole through spacetime. that means the other end of a wormhole come out at a different time, not just a different place. or it could come out in the same place, but at a different time. it means that there is nothing in the laws of physics which says time travel is impossible.. if you jumped at one end of a wormwhole, you could come out not just anywhere in the universe, but anywhen. that's what i know about black holes. |
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Re: Black holes
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by
on 2008-01-31 12:06:50 |
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Information does not travel backwards in time. This is a law of physics on the same order as entropy. If you jumped into a black hole, your information ceases to exist. Your spaghettified atoms, after being subsumed by the event horizon, contribute to the entropy and angular momentum of the black hole. Let me be clear: There is absolutely no reason to suppose what would happen on the inside of a black hole! NOTHING that happens on the inner edge of the event horizon has consequences on the outside, with the exception of the Hawkings radiation. Even the singularity its self, if it were even sensible to speak of it alone without the event horizon, would not necessarily be a worm hole. A worm hole is a loop in space-time. The singularity is a hole in space-time. When I make a hole in a piece of paper, I do NOT necessarily connect it to some other hole by a loop. I can just poke holes all day long, and never connect any two at all! Just the same, a naked singularity, as laughable as the concept is, may lead to nowhere and nowhen, just as easily as anywhere and anywhen. In fact, due to the contradictions that would arise from the later, the former is the most likely case! All this hogwash about time travel is sickening to me, so please get over it. Seriously. STFU.
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