Review of Short Phrases and Links|
This Review contains major "Black Holes"- related terms, short phrases and links grouped together in the form of Encyclopedia article.
- Black holes, the big bang, the big crunch, the multiverse, dark matter, etc.
- 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.
- Black holes are thought to result from the collapse of very massive stars at the ends of their evolution.
- Black holes are areas where end of life stars cool and contract causing an alteration in gravity, density and time.
- Black holes are so massive that their escape velocity is faster than the speed of light.
- For 19 of them, they found, as expected, that these super massive black holes are surrounded by a host galaxy.
- For 19 of them, they found, as expected, that these super-massive black holes are surrounded by a host galaxy.
- Quasars are now thought to be galaxies forming, with their extreme energy output being powered by super-massive black holes.
- Using the physical laws of the currently known cosmologies, the evolution of matter as galaxies and black holes is simulated and recorded.
- Duality predicts that the entropy of these black holes is related to the quartic invariant of the E(7,7) group.
- 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.
- Black holes in the real universe and their prospects as probes of relativistic gravity.
- 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.
- Further, it led to the computation of quantum gravity corrections to the entropy and radiation of black holes.
- But without a satisfactory theory of quantum gravity, one cannot perform such a computation for black holes.
- For non-rotating black holes, the photon sphere has a radius 1.5 times that of the event horizon.
- Although charged black holes with are similar to the Schwarzschild black hole, they have two horizons: the event horizon and an internal Cauchy horizon.
- For black holes with a larger mass, the event horizon is farther out, so the QPO frequency is lower.
- His research has been in the fields of quantum gravity, black holes and early-universe cosmology.
- New research suggests supermassive black holes that spin backwards might produce more ferocious jets of gas.
- Because black holes absorb light, they cannot be studied using telescopes or other instruments that rely on light waves.
- For objects as dense as black holes, this stops being the case.
- A third possibility is that supermassive black holes grow from clusters of smaller black holes that merge." Or maybe it's something else entirely.
- That absence, they say, rules out an initial interpretation that the burst came from merging neutron stars or black holes within Andromeda.
- The collision merges the black holes and stirs up gas in both galaxies.
- Before black holes were discovered it was know that the collision of two photons can cause pair production.
- 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.
- 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.
- Thus, as long suspected, black holes have the maximum entropy for given mass and size which is allowed by quantum theory and general relativity.
- This was a natural transformation since I wanted to understand the Hawking radiation or the quantum theory of the black holes.
- Some of the stars will drift away, but some will fall into giant "black holes" that lurk in the hearts of most galaxies.
- Astronomers believe these objects contain supermassive black holes at their hearts, which are encircled by disks of gas.
- 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.
- NGC 6240 is a system in which two supermassive black holes are a mere 3,000 light years apart, virtually nothing in astronomical terms.
- Information theory also has applications in gambling and investing, black holes, bioinformatics, and music.
- Astronomers made an accurate census of both the biggest, active black holes in the distance, and the relatively smaller, calmer ones closer to Earth.
- Black holes lurk at the centres of active galaxies in environments not unlike those found in violent tornadoes on Earth.
- More recent work seeks Black Holes in some very unexpected places, even inside Earth.
- The evidence for stellar black holes strongly relies on the existence of an upper limit for the mass of a neutron star.
- We conclude with recent results on the quantum physics of black holes which show the the interior of black holes have a `fuzzball' structure.
- Quantum Physics of the Black Holes; qualitative aspects of the Hawking radiation and Black Holes evaporation.
- The existence of super-massive black holes at the cores of galaxies was confirmed through X-ray astronomy.
- Most cosmic rays originate from extrasolar sources within our own galaxy such as rotating neutron stars, supernovae, and black holes.
- If, as some suspect, the Universe contains invisible, extra dimensions, then cosmic rays that hit the atmosphere will produce tiny black holes.
- Very gradually, collisions between these would result in mass accumulating into larger and larger black holes.
- Astronomy satellites study stellar phenomenona like black holes, quasars, and distant galaxies.
- They are thought to be powered by supermassive black holes that lie at the core of distant galaxies.
- Hubble has found that black holes reside at the centre of most galaxies, such as the Black Eye Galaxy.
- Hubble has shown that black holes are most likely to be present at the centre of most galaxies.
- Einstein's equations, black holes, orbits, the precession of perihelion, the deflection of light, red-shifts, cosmology and the Hubble flow.
- At a time of 10^(25) years, the material in the "Local Galaxy" consists of isolated stellar remnants and black holes.
- Until that time, neutron stars, like black holes, were regarded as just theoretical curiosities.
- Active Galactic Nuclei (AGN) are thought to be powered by supermassive black holes that are devouring large amounts of matter.
- It is currently thought that most, if not all galaxies, including the Milky Way, contain supermassive black holes at their galactic centers.
- Supermassive black holes are believed to reside at the cores of every galaxy, though some are thought to be more active than others.
- 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.
- Therefore, charged elementary particles cannot at the same time be black holes (or point-shaped).
- 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.
- Spherical black holes (without electric charge) are known as Schwarzschild black holes.
- One reason astronomers study Messier 101's X-rays is to better understand how black holes grow in spiral galaxies.
- If there are no light charged particles, these black holes could not decay efficiently, barring improbable conspiracies or remnants.
- Chandra's X-ray uncovers the high-energy features in the galaxy, such as remnants of exploded stars or matter zooming around black holes.
- Some stars explode and are entirely destroyed, but most leave remnants: white dwarfs, neutron stars, or black holes.
- 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.
- In space, nebulae, stars, black holes, and planets all have angular momentum, and they all spin around.
- A page on modern physics, such as quantum mechanics and black holes, and some mathematics.
- 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.
- Unlike black holes, time travel, and quantum mechanics, resonance is common place and easy to observe.
- Sources of X-rays include million-degree gas, exploded stars, and material colliding around black holes.
- 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.
- Most X-rays are emitted by pockets of hot gases found between galaxies and near black holes.
- These observations provide astronomers with new insights on how super-massive black holes lurking inside galaxies get fed.
- Theory and observations indicate that black holes of a few solar masses form when very massive stars die.
- New observations are shedding light on how black holes acquire mass.
- At least one galaxy, Galaxy 0402+379, appears to have two supermassive black holes at its center, forming a binary system.
- In the recent past, the community has also proposed that the centers of most galaxies contain black holes of unbelievable magnitude.
- Supermassive black holes found by Hubble in the centers of galaxies represent about 0.5 percent of the galaxies' mass.
- 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.
- The theory of relativity, by contrast, is a theory of the macrocosmic world, the world of galaxies, super clusters, black holes, and Creation itself.
- A continuation of the above work gives another result in relativity proved by Yau, an existence theorem for black holes.
- In 1960, he developed the well-known Kruskal Coordinates (also called Kruskal-Szekeres Coordinates), used in the theory of relativity to explain black holes.
- Space-Time Physics and the Future of Time Travel - Black holes, wormholes, time dilation factor, gravity, graphs and equations.
- BBCi - Space - Time Travel - Gravity, black holes, singularity and mini wormholes.
- As you might expect, the possibility of time travel involves those most extreme objects, black holes.
- So black holes are essential to galaxy formation, and every galaxy probably has one at its center.
- It tells of supernovae, dark matter, dark energy, curved spacetime, colliding galaxies, and supermassive black holes.
- Black Holes, Event Horizons, math, plasma cosmology, electric universe, dark matter, dark energy.
- Most, if not all, large galaxies, such as our galaxy the Milky Way, host super-massive black holes at their centers.
- About the planets, quasars, the Milky Way, black holes.
- Our Milky Way may harbor millions of these black holes, the ultra dense remnants of dead stars.
- The swallowing of a neutron star by a black hole, and the collisions and coalescences of black holes.
- Black Holes According to the American Astronomical Society, every large galaxy has a black hole at its center.
- 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.
- Roger Penrose had proposed a frame dragging mechanism for extracting energy and momentum from rotating black holes.
- Roy Kerr generalized the Schwarzschild geometry to include rotating stars, and especially rotating Black Holes.
- Theoretical Physics > Relativity > General Relativity > Black Hole
- Science > Astronomy > Universe > Galaxies
- Information > Science > Physics > Neutron
- Encyclopedia of Finance. > Technology > Energy > Entropy
* Active Galaxies
* Big Bang
* Big Rip
* Cosmic Strings
* Exact Solutions
* General Relativity
* Globular Clusters
* Gravitational Radiation
* Internet Address Space
* Karl Schwarzschild
* Massive Black Holes
* Numerical Relativity
* Observable Universe
* Quantum Effects
* Quantum Gravity
* Solar Mass
* Stephen Hawking
* String Theory
* Supermassive Black Hole
* Supermassive Black Holes
* Supernova Explosions
* Synchronous Orbits
* X-Ray Sources
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