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  Encyclopedia of Keywords > Theoretical Physics > Relativity > General Relativity > Black Hole > Black Holes   Michael Charnine

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    This Review contains major "Black Holes"- related terms, short phrases and links grouped together in the form of Encyclopedia article.


  1. Black holes, the big bang, the big crunch, the multiverse, dark matter, etc.
  2. Black holes are regions in space where matter is so dense and the force of gravity so great that not even light can escape the pull of gravity. (Web site)
  3. Black holes are thought to result from the collapse of very massive stars at the ends of their evolution. (Web site)
  4. Black holes are areas where end of life stars cool and contract causing an alteration in gravity, density and time. (Web site)
  5. Black holes are so massive that their escape velocity is faster than the speed of light. (Web site)

Super Massive Black Holes

  1. For 19 of them, they found, as expected, that these super massive black holes are surrounded by a host galaxy. (Web site)

Super-Massive Black Holes

  1. For 19 of them, they found, as expected, that these super-massive black holes are surrounded by a host galaxy.
  2. Quasars are now thought to be galaxies forming, with their extreme energy output being powered by super-massive black holes. (Web site)


  1. Using the physical laws of the currently known cosmologies, the evolution of matter as galaxies and black holes is simulated and recorded.


  1. Duality predicts that the entropy of these black holes is related to the quartic invariant of the E(7,7) group. (Web site)
  2. If the CFT part of the duality is in a pure state, the associated entropy is zero - and yet the AdS side contains (virtual) black holes etc. (Web site)


  1. Black holes in the real universe and their prospects as probes of relativistic gravity. (Web site)


  1. So when black holes began to show up in the centres of more ordinary galaxies, it was natural to assume that they must be burnt-out quasars.


  1. Further, it led to the computation of quantum gravity corrections to the entropy and radiation of black holes.
  2. But without a satisfactory theory of quantum gravity, one cannot perform such a computation for black holes. (Web site)

Event Horizon

  1. For non-rotating black holes, the photon sphere has a radius 1.5 times that of the event horizon. (Web site)
  2. Although charged black holes with are similar to the Schwarzschild black hole, they have two horizons: the event horizon and an internal Cauchy horizon.
  3. For black holes with a larger mass, the event horizon is farther out, so the QPO frequency is lower.


  1. His research has been in the fields of quantum gravity, black holes and early-universe cosmology.
  2. New research suggests supermassive black holes that spin backwards might produce more ferocious jets of gas.


  1. Because black holes absorb light, they cannot be studied using telescopes or other instruments that rely on light waves. (Web site)


  1. For objects as dense as black holes, this stops being the case. (Web site)


  1. A third possibility is that supermassive black holes grow from clusters of smaller black holes that merge." Or maybe it's something else entirely.


  1. That absence, they say, rules out an initial interpretation that the burst came from merging neutron stars or black holes within Andromeda. (Web site)


  1. The collision merges the black holes and stirs up gas in both galaxies.
  2. Before black holes were discovered it was know that the collision of two photons can cause pair production.


  1. Astronomers had thought the neutron stars needed a maximum mass between 1.6 and 2.5 Suns in order to collapse and become black holes. (Web site)
  2. The catch is, that the gravitational centers must exist but they must not include too much mass, or else they might collapse into super-massive black holes.

Quantum Theory

  1. Thus, as long suspected, black holes have the maximum entropy for given mass and size which is allowed by quantum theory and general relativity.
  2. This was a natural transformation since I wanted to understand the Hawking radiation or the quantum theory of the black holes.


  1. Some of the stars will drift away, but some will fall into giant "black holes" that lurk in the hearts of most galaxies. (Web site)
  2. Astronomers believe these objects contain supermassive black holes at their hearts, which are encircled by disks of gas.
  3. From the tiny Electron to the super-massive Black Holes at the hearts of galaxies, no single thing in this universe has an infinite mass. (Web site)

Light Years

  1. NGC 6240 is a system in which two supermassive black holes are a mere 3,000 light years apart, virtually nothing in astronomical terms.


  1. Information theory also has applications in gambling and investing, black holes, bioinformatics, and music. (Web site)


  1. Astronomers made an accurate census of both the biggest, active black holes in the distance, and the relatively smaller, calmer ones closer to Earth. (Web site)
  2. Black holes lurk at the centres of active galaxies in environments not unlike those found in violent tornadoes on Earth. (Web site)
  3. More recent work seeks Black Holes in some very unexpected places, even inside Earth. (Web site)


  1. The evidence for stellar black holes strongly relies on the existence of an upper limit for the mass of a neutron star. (Web site)

Quantum Physics

  1. We conclude with recent results on the quantum physics of black holes which show the the interior of black holes have a `fuzzball' structure.
  2. Quantum Physics of the Black Holes; qualitative aspects of the Hawking radiation and Black Holes evaporation. (Web site)

X-Ray Astronomy

  1. The existence of super-massive black holes at the cores of galaxies was confirmed through X-ray astronomy.

Cosmic Rays

  1. Most cosmic rays originate from extrasolar sources within our own galaxy such as rotating neutron stars, supernovae, and black holes. (Web site)
  2. If, as some suspect, the Universe contains invisible, extra dimensions, then cosmic rays that hit the atmosphere will produce tiny black holes.


  1. Very gradually, collisions between these would result in mass accumulating into larger and larger black holes.

Distant Galaxies

  1. Astronomy satellites study stellar phenomenona like black holes, quasars, and distant galaxies. (Web site)
  2. They are thought to be powered by supermassive black holes that lie at the core of distant galaxies.


  1. Hubble has found that black holes reside at the centre of most galaxies, such as the Black Eye Galaxy. (Web site)
  2. Hubble has shown that black holes are most likely to be present at the centre of most galaxies. (Web site)
  3. Einstein's equations, black holes, orbits, the precession of perihelion, the deflection of light, red-shifts, cosmology and the Hubble flow.


  1. At a time of 10^(25) years, the material in the "Local Galaxy" consists of isolated stellar remnants and black holes.
  2. Until that time, neutron stars, like black holes, were regarded as just theoretical curiosities. (Web site)


  1. Active Galactic Nuclei (AGN) are thought to be powered by supermassive black holes that are devouring large amounts of matter. (Web site)
  2. It is currently thought that most, if not all galaxies, including the Milky Way, contain supermassive black holes at their galactic centers. (Web site)
  3. Supermassive black holes are believed to reside at the cores of every galaxy, though some are thought to be more active than others. (Web site)

Elementary Particles

  1. For comparison, a proton has a mass of 1.67262158 × 10 -24 g -- all of the elementary particles are far too small to become black holes.
  2. Therefore, charged elementary particles cannot at the same time be black holes (or point-shaped). (Web site)

Electric Charge

  1. My derivation includes the possibility of electric charge on the black hole, although real black holes in the universe are very likely to be neutral.
  2. Spherical black holes (without electric charge) are known as Schwarzschild black holes. (Web site)

Spiral Galaxies

  1. One reason astronomers study Messier 101's X-rays is to better understand how black holes grow in spiral galaxies.


  1. If there are no light charged particles, these black holes could not decay efficiently, barring improbable conspiracies or remnants.
  2. Chandra's X-ray uncovers the high-energy features in the galaxy, such as remnants of exploded stars or matter zooming around black holes. (Web site)
  3. Some stars explode and are entirely destroyed, but most leave remnants: white dwarfs, neutron stars, or black holes.

Angular Momentum

  1. This relation is exact only for black holes with zero charge and angular momentum, for more general black holes it can differ up to a factor of 2. (Web site)
  2. In space, nebulae, stars, black holes, and planets all have angular momentum, and they all spin around.

Quantum Mechanics

  1. A page on modern physics, such as quantum mechanics and black holes, and some mathematics.
  2. It has not yet been proved that there is no breakdown of quantum mechanics due to black holes, but I expect that result to follow in due course. (Web site)
  3. Unlike black holes, time travel, and quantum mechanics, resonance is common place and easy to observe. (Web site)


  1. Sources of X-rays include million-degree gas, exploded stars, and material colliding around black holes. (Web site)
  2. The hard X-rays more readily penetrate dust and gas clouds in merging galaxies and reveal the presence of emission from the active black holes.
  3. Most X-rays are emitted by pockets of hot gases found between galaxies and near black holes.


  1. These observations provide astronomers with new insights on how super-massive black holes lurking inside galaxies get fed. (Web site)
  2. Theory and observations indicate that black holes of a few solar masses form when very massive stars die. (Web site)
  3. New observations are shedding light on how black holes acquire mass. (Web site)


  1. At least one galaxy, Galaxy 0402+379, appears to have two supermassive black holes at its center, forming a binary system. (Web site)


  1. In the recent past, the community has also proposed that the centers of most galaxies contain black holes of unbelievable magnitude. (Web site)
  2. Supermassive black holes found by Hubble in the centers of galaxies represent about 0.5 percent of the galaxies' mass. (Web site)
  3. This novel mode of star formation may solve several mysteries about these super-massive black holes that reside at the centers of nearly all galaxies. (Web site)


  1. The theory of relativity, by contrast, is a theory of the macrocosmic world, the world of galaxies, super clusters, black holes, and Creation itself.
  2. A continuation of the above work gives another result in relativity proved by Yau, an existence theorem for black holes.
  3. In 1960, he developed the well-known Kruskal Coordinates (also called Kruskal-Szekeres Coordinates), used in the theory of relativity to explain black holes.

Time Travel

  1. Space-Time Physics and the Future of Time Travel - Black holes, wormholes, time dilation factor, gravity, graphs and equations.
  2. BBCi - Space - Time Travel - Gravity, black holes, singularity and mini wormholes.
  3. As you might expect, the possibility of time travel involves those most extreme objects, black holes. (Web site)

Galaxy Formation

  1. So black holes are essential to galaxy formation, and every galaxy probably has one at its center. (Web site)

Dark Matter

  1. It tells of supernovae, dark matter, dark energy, curved spacetime, colliding galaxies, and supermassive black holes. (Web site)
  2. Black Holes, Event Horizons, math, plasma cosmology, electric universe, dark matter, dark energy.

Milky Way

  1. Most, if not all, large galaxies, such as our galaxy the Milky Way, host super-massive black holes at their centers.
  2. About the planets, quasars, the Milky Way, black holes.
  3. Our Milky Way may harbor millions of these black holes, the ultra dense remnants of dead stars.

Black Hole

  1. The swallowing of a neutron star by a black hole, and the collisions and coalescences of black holes. (Web site)
  2. Black Holes According to the American Astronomical Society, every large galaxy has a black hole at its center.
  3. Black holes give us a clue to this; if the escape velocity of a black hole is the speed of light then everything will be drawn in at light speed.

Rotating Black Holes

  1. Roger Penrose had proposed a frame dragging mechanism for extracting energy and momentum from rotating black holes.
  2. Roy Kerr generalized the Schwarzschild geometry to include rotating stars, and especially rotating Black Holes.


  1. Theoretical Physics > Relativity > General Relativity > Black Hole
  2. Science > Astronomy > Universe > Galaxies
  3. Information > Science > Physics > Neutron
  4. Encyclopedia of Finance. > Technology > Energy > Entropy
  5. Dwarfs


Hawking Radiation
Kerr Metric
Naked Singularity
Ring Singularity

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