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• Black_hole abstract "A black hole is defined as a region of spacetime from which 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. The hole is called "black" because it absorbs all the light that hits the horizon, reflecting nothing, just like a perfect black body in thermodynamics. Quantum field theory in curved spacetime predicts that event horizons 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.Objects whose gravity fields are too strong for light to escape were first considered in the 18th century by John Michell and Pierre-Simon Laplace. The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958. Long considered a mathematical curiosity, it was during the 1960s that theoretical work showed black holes were a generic prediction of general relativity. The discovery of neutron stars sparked interest in gravitationally collapsed compact objects as a possible astrophysical reality.Black holes of stellar mass are expected to form when very massive stars collapse at the end of their life cycle. After a black hole has formed it can continue to grow by absorbing mass from its surroundings. By absorbing other stars and merging with other black holes, supermassive black holes of millions of solar masses may form. There is general consensus that supermassive black holes exist in the centers of most galaxies.Despite its invisible interior, the presence of a black hole can be inferred through its interaction with other matter and with electromagnetic radiation such as light. Matter falling onto a black hole can form an accretion disk heated by friction, forming some of the brightest objects in the universe. If there are other stars orbiting a black hole, their orbit can be used to determine its mass and location. Such observations can be used to exclude possible alternatives (such as neutron stars). In this way, astronomers have identified numerous stellar black hole candidates in binary systems, and established that the core of the Milky Way contains a supermassive black hole of about 4.3 million solar masses.".
• Black_hole thumbnail BH_LMC.png?width=300.
• Black_hole wikiPageExternalLink bh_pub_faq.html.
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• Black_hole wikiPageExternalLink books?id=9S-hzg6-moYC.
• Black_hole wikiPageExternalLink books?id=r_l5AK9DdXsC&lpg=PA34.
• Black_hole wikiPageExternalLink schwp.html.
• Black_hole wikiPageExternalLink black_holes.
• Black_hole wikiPageExternalLink home.html.
• Black_hole wikiPageExternalLink core8.htm.
• Black_hole wikiPageExternalLink notes.
• Black_hole wikiPageExternalLink spacetime-singularities.
• Black_hole wikiPageExternalLink index.php.
• Black_hole wikiPageExternalLink eso0846b.
• Black_hole wikiPageExternalLink Black_hole.
• Black_hole wikiPageID "4650".
• Black_hole wikiPageRevisionID "605282199".
• Black_hole b "General Astronomy/Black holes/Introduction".
• Black_hole commons "Category:Black holes".
• Black_hole hasPhotoCollection Black_hole.
• Black_hole voy "no".
• Black_hole wikt "no".
• Black_hole subject Category:Black_holes.
• Black_hole subject Category:Galaxies.
• Black_hole subject Category:Theory_of_relativity.
• Black_hole type Agent.
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• Black_hole comment "A black hole is defined as a region of spacetime from which 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.".
• Black_hole label "Agujero negro".
• Black_hole label "Black hole".
• Black_hole label "Buco nero".
• Black_hole label "Buraco negro".
• Black_hole label "Czarna dziura".
• Black_hole label "Schwarzes Loch".
• Black_hole label "Trou noir".
• Black_hole label "Zwart gat".
• Black_hole label "Чёрная дыра".
• Black_hole label "ثقب أسود".
• Black_hole label "ブラックホール".
• Black_hole label "黑洞".
• Black_hole sameAs Černá_díra.
• Black_hole sameAs Schwarzes_Loch.
• Black_hole sameAs Μαύρη_τρύπα.
• Black_hole sameAs Agujero_negro.
• Black_hole sameAs Zulo_beltz.
• Black_hole sameAs Trou_noir.
• Black_hole sameAs Lubang_hitam.
• Black_hole sameAs Buco_nero.
• Black_hole sameAs ブラックホール.
• Black_hole sameAs 블랙홀.
• Black_hole sameAs Zwart_gat.
• Black_hole sameAs Czarna_dziura.
• Black_hole sameAs Buraco_negro.
• Black_hole sameAs m.01h1s.
• Black_hole sameAs Q589.
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• Black_hole wasDerivedFrom Black_hole?oldid=605282199.
• Black_hole depiction BH_LMC.png.
• Black_hole isPrimaryTopicOf Black_hole.