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Topic: Timeline of black hole physics


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In the News (Sat 16 Dec 17)

  
  Black hole - Wikipedia, the free encyclopedia
Supermassive fl holes containing millions to billions of solar masses could also form wherever a large number of stars are packed in a relatively small region of space, or by large amounts of mass falling into a "seed" fl hole, or by repeated fusion of smaller fl holes.
The "surface" of a fl hole is the so-called event horizon, an imaginary surface surrounding the mass of the fl hole.
Using the first law of fl hole mechanics, it follows that the entropy of a fl hole is one quarter of the area of the horizon.
en.wikipedia.org /wiki/Black_hole   (4691 words)

  
 Black hole - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-07)
Black holes require the general relativistic concept of a curved spacetime: their most striking properties rely on a distortion of the geometry of the space surrounding them.
The current picture is that all galaxies may have a supermassive fl hole in their center, and that this fl hole swallows gas and dust in the middle of the galaxies generating huge amounts of radiation — until all the nearby mass has been swallowed and the process shuts off.
Though the details are still not clear, it seems that the growth of the fl hole is intimately related to the growth of the spheroidal component — an elliptical galaxy, or the bulge of a spiral galaxy — in which it lives.
www.peekskill.us /project/wikipedia/index.php/Black_Hole   (4342 words)

  
 * Black Hole - (Astronomy): Definition   (Site not responding. Last check: 2007-10-07)
Black holes are extremely compact space objects that were once massive stars which collapsed inward due to the force of their own...
Black holes are also collapsed dead stars, yet they are so dense that even light cannot escape from their gravitational pull.
Specifically defined, a fl hole is a region in space where the velocity of escape exceeds the speed of light in that medium.
www.bestknows.com /astronomy/black_hole.html   (1567 words)

  
 Formation of a Black Hole
A nonspinning, uncharged fl hole is known as a Swarzschild fl hole.
Massive stellar fl holes at the center galaxies may be as much as a million times the sun’s mass (10^36 kg).
However as he gets closer to the fl hole, he feels a variation of gravitational pull between his head and his feet if either his head or his feet are closer to the fl hole.
www.csvrgs.k12.va.us /Courses/IntroTech/pages/blackholes.html   (2011 words)

  
 Wormhole - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-07)
In physics, a wormhole, also known as an Einstein-Rosen bridge, is a hypothetical topological feature of spacetime, which is essentially a "shortcut" through space and time.
At one time, fl holes in science fiction were often incorrectly endowed with the traits of wormholes.
This has, for the most part disappeared as a fl hole isn't really a hole in space but a dense mass and the visible vortex effect often associated with fl holes is merely the accretion disk of visible matter being drawn toward it.
www.butte-silverbow.us /project/wikipedia/index.php/Wormhole   (1786 words)

  
 The Black Hole Next Door: Science News Online, March 23, 2002   (Site not responding. Last check: 2007-10-07)
As a rule of thumb in particle physics, energies correspond to sizes—the smaller the dimension to be probed by smashing particles together the higher are the accelerator energies required.
If fl holes are in fact produced in future colliders, that would mean they also have been relentlessly zipping in and out of existence in the atmosphere for billions of years.
Although most astrophysicists are convinced that cosmic fl holes exist, they can only infer the objects' existence from such evidence as motions of nearby stars and gas and the presence of jets of matter or radiation.
www.sciencenews.org /20020323/bob9.asp   (2085 words)

  
 NASA - A Race Round a Black Hole
This is big news for fl hole hunters because the observation marks the first time scientists could trace individual blobs of shredded matter on a complete journey around a fl hole.
Black holes are regions in space so dense that gravity prevents all matter and light from escaping.
The width (or period) of the curves is proportional to fl hole mass.
www.nasa.gov /centers/goddard/universe/blackhole_race.html   (1373 words)

  
 Black hole   (Site not responding. Last check: 2007-10-07)
Shortly thereafter, the use of the expression "fl hole" was coined by theoretical physicist John Wheeler [http://www.truephysics.com/timeline/timeline1961_1980.html].
Black holes require the general relativitygeneral relativistic concept of a curved spacetime/: their most striking properties rely on a distortion of the geometry of the space surrounding them.
The "surface" of a fl hole is the so-called ''event horizon,'' an imaginary spheroidal surface surrounding the mass of the fl hole.
www.infothis.com /find/Black_hole   (4287 words)

  
 CONK! Encyclopedia: Timeline   (Site not responding. Last check: 2007-10-07)
Timeline is a 2003 film based on the novel.
General: List of years in science, Timeline of scientific discoveries, Timeline of scientific experiments, Timeline of environmental history of New Zealand, Timeline of Islamic science and technology, Timeline of Polish science and technology
Timeline of quantum mechanics, molecular physics, atomic physics, nuclear physics, and particle physics
www.conk.com /search/encyclopedia.cgi?q=Timeline   (404 words)

  
 Black hole   (Site not responding. Last check: 2007-10-07)
Black holes are objects so dense that not even light can escape their gravity.
The core of the galaxy M87, where there is evidence for a supermassive fl hole.
Black holes are created by the gravitational collapse of supermassive stars.
www.city-search.org /bl/black-hole.html   (1321 words)

  
 Site Contents at the free Online Encyclopedia.   (Site not responding. Last check: 2007-10-07)
Timeline of U.S. attack on Afghanistan in January 2002
Timeline of knowledge about galaxies, clusters of galaxies, and large-scale structure
Timeline of knowledge about the interstellar and intergalactic medium
www.onlineencyclopedia.org /index_321.html   (136 words)

  
 astronomy timeline   (Site not responding. Last check: 2007-10-07)
Timeline of fl hole physics Timeline of cosmology Timeline of cosmic microwave background astronomy Timeline of other background radiation fields Timeline of galaxies, clusters of galaxies, and...
Timelines in astronomy Timeline of artificial satellites and space probes Timeline of astronomical maps, catalogs, and surveys Timeline of fl hole physics Timeline of cosmic microwave background...
Timelines in astronomy Timeline of fl hole physics Timeline of cosmology Timeline of cosmic microwave background astronomy Timelineof other background radiation fields Timeline of galaxies...
www.amatureastronomytoday.info /astronomytimeline_2   (474 words)

  
 Timeline of black hole physics - Open Encyclopedia   (Site not responding. Last check: 2007-10-07)
So according to him such strange classical bodies, similar to white holes, can exist, which won't let other bodies to reach their surfaces
2002 - Astronomers present evidence for the hypothesis that Sagittarius A* is a supermassive fl hole at the centre of the Milky Way galaxy
See also: Timeline of gravitational physics and relativity.
open-encyclopedia.com /Timeline_of_black_hole_physics   (608 words)

  
 Cosmic Couple: One galaxy, two gravitational beasts: Science News Online, Nov. 30, 2002   (Site not responding. Last check: 2007-10-07)
In a single galaxy, two massive fl holes are spiraling toward each other in a gravitational dance that will end in a few hundred million years, when the fl holes merge, astronomers report.
He says that Komossa's team was fortunate to find a galaxy in which two massive fl holes are both radiating large amounts of X rays.
As the two giant fl holes in NGC 6240 bridge their 3,000—light-year gap and merge over millions of years, they will release intense radiation.
www.sciencenews.org /articles/20021130/fob1.asp   (675 words)

  
 Timeline of black hole physics at opensource encyclopedia   (Site not responding. Last check: 2007-10-07)
Timeline of fl hole physics 1640 - Ismael Bullialdus suggests an inverse-squa...
Carter, and Stephen Hawking propose four laws of fl hole mechanics in analogy with the laws of thermodynamics...
a fl hole at the centre of the Milky Way assuming the current standard laws of physics are...
www.springknow.com /Timeline_of_black_hole_physics.html   (959 words)

  
 List of themed timelines : Timeline
Timelines are sequences of related events in chronological order.
List of timelines from across the web of things that never were (http://www.mts.net/~arphaxad/history.html)
Our canoe As a leaping fish does." Unwilling to risk swamping my instruments, I put into the under a tricolour, and manned only by Laptots.
www.findword.org /ti/timeline.html   (315 words)

  
 Timeline of black hole physics - Wikipedia, the free encyclopedia
1968 - Brandon Carter uses Hamilton-Jacobi theory to derive first-order equations of motion for a charged particle moving in the external fields of a Kerr-Newman fl hole
1972 - James Bardeen, Brandon Carter, and Stephen Hawking propose four laws of fl hole mechanics in analogy with the laws of thermodynamics
This page was last modified 22:42, 29 August 2005.
en.wikipedia.org /wiki/Timeline_of_black_hole_physics   (621 words)

  
 Timeline of black hole physics Info - Encyclopedia WikiWhat.com
1974 - Stephen Hawking applies quantum field theory to fl hole spacetimes and shows that fl holes will radiate particles with a flbody spectrum which can cause fl hole evaporation,
2002 - NASA's Chandra X-ray Observatory identifies double galactic fl holes system in merging galaxies NGC 6240.
You can learn about or download your favorite free ringtones for the summer.
www.wikiwhat.com /encyclopedia/t/ti/timeline_of_black_hole_physics.html   (686 words)

  
 Encyclopedia: Timeline of black hole physics   (Site not responding. Last check: 2007-10-07)
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Click for other authoritative sources for this topic (summarised at Factbites.com).
www.nationmaster.com /encyclopedia/Timeline-of-black-hole-physics   (664 words)

  
 List of themed timelines   (Site not responding. Last check: 2007-10-07)
How to - Physics - History - Companies - Internet - Video Games - List of Phobias - September 11, 2001
Radio - Timelines - Chemistry - Genealogy - Family - Film - SARS - Cancer - Medicine - DVD - Calendar
Links - HOME - Help build the worlds largest free encyclopedia.
www.talkroot.com /library/List_of_themed_timelines.shtml.htm   (182 words)

  
 Big Bang Timeline on Almondnet
Universe and Big Bang Theory Timeline and Origin of the Universe and History of the Universe and Timeline since the Big Bang...
Structure And the Universe and Big Bang Timeline and Universe Formed and End of the Universe...
The Big Bang theory is currently (2003) the dominant theory in cosmology about the early development and current shape of the universe.
www.flights-to-fuerteventura.co.uk /ftf/big_bang_timeline.html   (376 words)

  
 List of themed timelines - Questionz.net , answers to all your questions   (Site not responding. Last check: 2007-10-07)
List of themed timelines - Questionz.net, answers to all your questions
HOME - Help build the worlds largest free encyclopedia.
September 11, 2001, Timeline of 9/11, World War 1, Vietnam War, Cold War, Mexican-American War, Iran-Iraq War, Korean War, Military History,
www.questionz.net /List_of_themed_timelines.html   (212 words)

  
 Everything you always wanted to know about List of themed timelines
Everything you always wanted to know about List of themed timelines
How to - History - Companies - Internet - Nintendo - List of Phobias - September 11, 2001
Timelines - Chemistry - Genealogy - Family - Film - SARS - Cancer - Medicine - DVD - Calendar
www.relan.net /List_of_themed_timelines.html   (166 words)

  
 science time line
Timelines of Events in Science, Mathematics, and Technology
1972 James Bardeen, Brandon Carter, and Stephen Hawking propose four laws of fl hole mechanics in analogy with the
1972 Jacob Bekenstein suggests that fl holes have an entropy proportional to their surface area due to information loss effects
www.physics.ohio-state.edu /~wilkins/science/sctmln.html   (12243 words)

  
 PSIgate Timeline - Physics
19-400 Syracuse saw the development of catapults that fired arrows, using basic physics principles
4811937 The Nobel Institute of Physics is established in Stockholm More about:
5101943 Slinky toy invented by Richard James; this simple device demonstrates physics laws and properties, such as waveforms and motion
www.psigate.ac.uk /newsite/physics_timeline.html   (6195 words)

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