Jared
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Post by Jared on Oct 3, 2002 17:12:22 GMT -5
Is anyone obsessed with these things like I am? Or just intensely interested? It's amazing how we've adopted the term, "black hole," to describe anything that uses up time, money, or energy or all of it. But that's the amazing thing, black holes actually make more energy than they take in, yet all they are, are holes in space, and even time. "A black hole is an area of space where nothing can come back and time stops." Yet all this comes from a large star that collapsed in on itself. Other black holes, like the supermassive ones at the center of most galaxies, get their mass from drawing in matter and energy. Yet, they are undetectable by themselves. The Hubble Space Telescope found the 2 or 3 million solar mass black hole at the center of our galaxy because of stars flying around the Milky Way's hub at a few hundred miles per second. Then there's what a black hole does. It doesn't "suck" like a vacuum cleaner. Black holes are known to push things away, like a planet. Imagine a two-solar mass black hole, bumping into our solar system and pushing the Earth out of its orbit. Then there's my favorite subject about black holes. Their size. Some black holes are small. A two-solar mass black hole, that is weighing as much as two of our suns, is about six miles wide. Then we have intermediate sized black holes weighing 10 solar masses and up to 1,000. Then we get into the ones called Super Massive black holes at the center of galaxies. Millions and even billions of solar mass black holes. A 30,000,000 solar mass black hole, at the center of the Andromeda Galaxy is the size of Earth's orbit around the sun. Its accretion disk is ten times that size! Then there's black holes the size of our solar system, like the one in the galaxy M-87 with an accretion disk a few light-days distance across. What's interesting is, the larger black holes are less violent than the smaller 10 solar mass type. Here's some links: www.msnbc.com/news/135107.asp This link will take you to a site where you can hear what a black hole might sound like. www.google.com is a great search engine. Type in, black holes, in the subject line and every site you've ever wanted will come up. So what say you? actually a kerr black hole does suck energy and matter but only a reissner nordstrom gives off energy and pushes matter away and a swartzschild is static and does not do anything
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Post by Toxic-Avenger on Oct 4, 2002 7:34:06 GMT -5
Actually I knew that, just couldn't keep them straight, but that clears it up for me. Cool, let the discussion continue!
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Jared
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Post by Jared on Oct 4, 2002 13:18:47 GMT -5
glad i helped clear it up , physics, space and time is my favorite
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Post by Toxic-Avenger on Oct 4, 2002 14:15:27 GMT -5
Yep, mine too. Probably not as deeply into the physics end of it like you, but it's enjoyable all the same.
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Chimera
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Zidane
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Post by Chimera on Oct 8, 2002 11:49:45 GMT -5
A black hole is just a rip in the time space continum caused by a collasped star,I know lots and lots about "Black holes" because I wrote A 12 page report on it.And its really interesting.
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Jared
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Post by Jared on Oct 8, 2002 20:54:38 GMT -5
it sure is and thats why theirs ideas of using them to travel through space or other universes or dimensions
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Post by Toxic-Avenger on Oct 9, 2002 8:37:56 GMT -5
How would we contain or manufacture a black hole? Somekind of electro-magnetic field perhaps, with the black hole generating the power needed to keep the field in place. This is a very cool idea. Do you think a black hole could be used to supply our energy needs in the future, too? <<I know lots and lots about "Black holes" because I wrote A 12 page report on it.And its really interesting. >> Well, let's have it! Just cut and paste all your hard work in here to benefit us! ;D Dang, you should have been here a few months ago. Go to this site and download it. It's the sound of a black hole. Actually it's the sound of a black hole's emissions. www.msnbc.com/news/135107.asp
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Jared
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Post by Jared on Oct 9, 2002 21:20:06 GMT -5
its all about electro magnetic fields to generate a black hole and i think we can use mini blackholes to generate power some day
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Post by Toxic-Avenger on Oct 10, 2002 8:37:35 GMT -5
Would they be "real" black holes? To make a black hole the size of a bowling ball, we'd need enough material the total size of Earth to squish down. So would these black holes be somekind of strong magnetic field, (which you may have already answered) pulling on another kind of energy?
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Jared
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Post by Jared on Oct 21, 2002 18:43:22 GMT -5
yes they would be real "quantum singularities" not a verry strong one but all you would need are strong electromagnetic fields to produce it but im not sure how it could be controlled though
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Post by m on Sept 10, 2003 12:46:59 GMT -5
Black hole sings the deepest B-flat
A chart of data from the Chandra X-Ray Observatory shows subtle ripples in the hot gas surrounding a supermassive black hole. The white spot at the center of the image represents the blaze of matter falling into the unseen black hole. Andy Fabian, a professor at the Institute of Astronomy in Cambridge, explains what the X-ray imagery reveals about the black hole and its sound. WASHINGTON, Sept. 9 — Big black holes sing bass. One particularly monstrous black hole has probably been humming B-flat for billions of years, but at a pitch no human could hear, let alone sing, astronomers said Tuesday.
“THE INTENSITY of the sound is comparable to human speech,” said Andrew Fabian of the Institute of Astronomy at Cambridge, England. But the pitch of the sound is about 57 octaves below the middle C at the middle of a standard piano keyboard.
This is far, far deeper than humans can hear, the researchers said, and they believe it is the deepest note ever detected in the universe.
The sound is emanating from the Perseus Cluster, a giant clump of galaxies 250 million light-years from Earth. A light-year is about 6 trillion miles (10 trillion kilometers), the distance light travels in a year.
Fabian and his colleagues used NASA’s orbiting Chandra X-Ray Observatory to investigate X-rays coming from the cluster’s heart. Researchers presumed that a supermassive black hole, with perhaps 2.5 billion times the mass of our sun, lay there, and the activity around the center bolstered this assumption. Black holes are powerful matter-sucking drains in space, and astronomers believe most galaxies, including our own Milky Way, may contain black holes at their centers. Black holes have not been directly observed, because their gravitational pull is so strong that nothing, not even light, can escape it.
So researchers have concentrated on what happens around the edges of black holes, just before the matter is pulled in. When scientists trained the Chandra observatory on the center of Perseus last year, they saw concentric ripples in the cosmic gas that fills the space between the galaxies in the cluster.
“We’re dealing with enormous scales here,” Fabian said in a telephone interview. “The size of these ripples is 30,000 light-years.” A color-coded X-ray image shows roughly the same area covered in the image above, with the bright surroundings of a black hole at the center of a figure-8-shaped pair of dark cavities. Fabian said the ripples were caused by the rhythmic squeezing and heating of the cosmic gas by the intense gravitational pressure of the jumble of galaxies packed together in the cluster. As the black hole pulls material in, he said, it also creates jets of material shooting out above and below it, and it is these powerful jets that create the pressure that creates the sound waves. To scientists, he said, pressure ripples equate to sound waves. By calculating how far apart the ripples were, and how fast sound might travel there, the team of researchers determined the musical note of the sound.
Fabian said the notion of singing black holes might well be extrapolated to other galaxies, but not necessarily to the Milky Way.
Chandra has looked at X-ray emissions from the Milky Way’s center, and astronomers believe there is a black hole there, but because it is a young, rambunctious galaxy with lots of activity at its heart, this may interfere with any note our black hole might sing, Fabian said.
© 2003 Reuters Limited. All rights reserved. Republication or redistribution of Reuters content is expressly prohibited without the prior written consent of Reuters.
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