Liang hideung

[thumb|right|329px|Gambar hasil simulasi: liang hideung di hareupeun Galaksi Bima Sakti lamun ditempo tina jarak 600 km. Liang hideung ieu boga massa 10 kalieun massa panonpoé. Sangkan bisa mertahankan diri dina jarak 600 km (henteu katarik ka jero liang) diperlukeun laju reaksi (ka arah lawan) nu gancangna kurang leuwih 400 yuta [g-force|g.]]

**Liang hideung** (Ing: ***black hole***) nyaéta hiji wewengkon di angkasa nu mangrupa tempat museurna massa anu pohara gedéna antukna ngahasilkeun gaya gravitasi anu kacida kuatna nu temahna moal aya naon waé ogé nu bakal bisa leupas lamun geus ancrub kana event horizonna kajaba ngaliwatan torowongan kuantum. Ngaran ieu mucunghul alatan kanyataan yén radiasi éléktromagnétik (contona cahaya) nu geus asup kana ieu liang, teu bisa leupas deui, cahayana henteu nepi ka panon urang antukna urang henteu bisa nempo éta wewengkon, atawa ngageblég hideung.  Liang hideung bisa kawénéhan lamun aya kajadian interaksi jeung bahan di *saluareun* sisina nu disebut *event horizon*, contona ku cara narik gas tina béntang. Gas baris muter katarik ka jero liang, jadi panas nepi ka hawana kacida pisan panasna sarta ngaluarkeun sajumlah gedé radiasi dina prosésna; radiasi ieu nu nepi kana mata urang antukna urang bisa nempo ieu prosés

While the idéa of an object with gravity strong enough to prevent light from escaping was proposed in the 18th century, black holes, as presently understood, are described by Einstein's théory of general relativity, developed in 1916. This théory predicts that when a large enough amount of mass is present within a sufficiently small region of space, all paths through space are warped inwards towards the center of the volume, forcing all matter and radiation to fall inward.

While general relativity describes a black hole as a region of empty space with a pointlike singularity at the center and an event horizon at the outer edge, the description changes when the effects of quantum mechanics are taken into account.  Reséarch on this subject indicates that, rather than holding captured matter forever, black holes may slowly léak a form of thermal energy called Hawking radiation.  However, the final, correct description of black holes, requiring a théory of quantum gravity, is unknown.

## Rujukan 
## Bacaan salajengna 
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### Buku teks jeung monograp universitas 
* Carter, B. (1973). Black hole equilibrium states, in *Black Holes*, eds. DeWitt B. S. and DeWitt C.
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* Frolov, V. P. and Novikov, I. D. (1998), *Black hole physics*.
* Hawking, S. W. and Ellis, G. F. R. (1973), *The large-scale structure of space-time*, Cambridge University Press.
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### Paper riset 
* Hawking, S. W. (July 2005), Information Loss in Black Holes, arxiv:hep-th/0507171. Stephen Hawking's purported solution to the black hole unitarity paradox, first reported at a conference in July 2004.
* Ghez, A.M. *et al.* Stellar orbits around the Galactic Center black hole, *Astrophysics J.* **620** (2005). arXiv:astro-ph/0306130 More accurate mass and position for the black hole at the centre of the Milky Way.
* Hughes, S. A. Trust but verify: the case for astrophysical black holes, arXiv:hep-ph/0511217. Lecture notes from 2005 SLAC Summer Institute.

## Tumbu luar 
* Yale University Video Lecture: Introduction to Black Holes  at Google Vidéo
* Black Holes: Gravity's Relentless Pull  - Award-winning interactive multimedia Web site about the physics and astronomy of black holes from the Space Telescope Science Institute
* FAQ on black holes
* Schwarzschild Geometry  on Andrew Hamilton’s website 
* Tufts University: Student Project (Great Kid's Section) 
* Movie of Black Hole Candidate from Max Planck Institute 
* UT Brownsville Group Simulates Spinning Black-Hole Binaries  13 April 2006
* Black Hole Research News on ScienceDaily
* Scientific American Magazine (July 2003 Issue) The Galactic Odd Couple - giant black holes and stellar baby booms
* Scientific American Magazine (May 2005 Issue) Quantum Black Holes
* SPACE.com All About Black Holes - News, Féatures and Interesting Original Vidéos
* Black Holes Intro - Introduction to Black Holes
* HowStuffWorks: How Black Holes Work - éasy to consume guide to Black Holes
* Ted Bunn's Black Holes FAQ  explains in simple language some other consequences of the way in which black holes bend space-time.