Astronomy
(New page: They are black. They suck.)
 
 
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'''Black holes''' are objects in space that are so massive or so condensed that even light can't escape them because the escape velocity from the [[gravity]], within a radius known as the ''event horizon'', is greater than [[lightspeed]]. Blackholes are the remnants of large stars though black holes may form in other ways as well. Since not even light can escape from a black hole, they can not be detected directly, but they can be detected by their effects on their surroundings. For instance, [[star]]s and other luminous objects may orbit around black holes. A star must be at least three solar masses for a black hole to form. Some scientists fear that human beings could create a black hole in a particle accelerator and destroy the [[Earth]]. [http://discovermagazine.com/2008/aug/24-the-extremely-long-odds-against-the-destruction-of-earth][http://www.aei.mpg.de/einsteinOnline/en/spotlights/accelerators_bh/index.html] Present day partile accelerators will not produce stronger collisions than happen naturally through cosmic ray collisions. What about the future?
They are black. They suck.
 
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==References and External links==
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*[http://www.enchantedlearning.com/subjects/astronomy/glossary/Blackhole.shtml Black Holes] Enchanted learning
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*[http://en.wikipedia.org/wiki/Black_hole Black Hole] Wikipedia
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===Videos===
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*[http://www.youtube.com/watch?v=XV7GgFMy4fA Black Holes Tall Grande Venti]
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*[http://www.youtube.com/watch?v=rw5trKz_kdc&feature=related Mysteries of Deep Space: Black Holes] This video deals with [[Neutron Star]]s and Black holes.
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*[http://www.youtube.com/watch?v=GYKyt3C0oT4&feature=channel Violent Universe: Inside a Black Hole]
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<small>Material added and adapted from [http://liberapedia.wikia.com/wiki/Black_hole Liberapedia]

Latest revision as of 02:33, 25 September 2009

Black holes are objects in space that are so massive or so condensed that even light can't escape them because the escape velocity from the gravity, within a radius known as the event horizon, is greater than lightspeed. Blackholes are the remnants of large stars though black holes may form in other ways as well. Since not even light can escape from a black hole, they can not be detected directly, but they can be detected by their effects on their surroundings. For instance, stars and other luminous objects may orbit around black holes. A star must be at least three solar masses for a black hole to form. Some scientists fear that human beings could create a black hole in a particle accelerator and destroy the Earth. [1][2] Present day partile accelerators will not produce stronger collisions than happen naturally through cosmic ray collisions. What about the future?

References and External links

Videos

Material added and adapted from Liberapedia