Black hole
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A black hole is a region of spacetime where gravity prevents anything, including light, from escaping. The theory of general relativity predicts that a sufficiently compact mass will deform spacetime to form a black hole. Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return. It is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics. Quantum mechanics predicts that black holes emit radiation like a black body with a finite temperature. This temperature is inversely proportional to the mass of the black hole, making it difficult to observe this radiation for black holes of stellar mass or greater.
- Related: Black brane, Black hole complementarity, Black holes in fiction, Black string, BTZ black hole, Dumb hole, Kugelblitz (astrophysics), Susskind-Hawking battle, Timeline of black hole physics, White hole, Wormhole
| Black Holes: Gravity's Relentless Pull Black Holes: Gravity's Relentless Pull hubblesite.org/explore_astronomy/black_holes/ - Web |
| FAQ on black holes FAQ on black holes antwrp.gsfc.nasa.gov/htmltest/gifcity/bh_pub_faq.html - Web |
| Advanced Mathematics of Black Hole Evaporation Advanced Mathematics of Black Hole Evaporation library.thinkquest.org/C007571/english/advance/core8.htm - Web |
Gallery for «Black hole»
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| 16-year long study tracks stars orbiting Milky Way... 16-year long study tracks stars orbiting Milky Way black hole www.eso.org/public/videos/eso0846b/ - Web |
| Movie of Black Hole Candidate from Max Planck Inst... Movie of Black Hole Candidate from Max Planck Institute www.mpe.mpg.de/ir/GC/index.php - Web |
