Black hole
A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and electromagnetic radiation such as light—can escape from inside it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of the region from which no escape is possible is called the event horizon. Although crossing the event horizon has enormous effect on the fate of the object crossing it, it appears to have no locally detectable features. In many ways a black hole acts like an ideal black body, as it reflects no light. Moreover, quantum field theory in curved spacetime predicts that event horizons emit Hawking radiation, with the same spectrum as a black body of a temperature inversely proportional to its mass. This temperature is on the order of billionths of a kelvin for black holes of stellar mass, making it essentially impossible to observe.
Objects whose gravitational 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. Black holes were long considered a mathematical curiosity; it was during the 1960s that theoretical work showed they 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 hole (networking)
In networking, black holes refer to places in the network where incoming or outgoing traffic is silently discarded (or "dropped"), without informing the source that the data did not reach its intended recipient.
When examining the topology of the network, the black holes themselves are invisible, and can only be detected by monitoring the lost traffic; hence the name.
Dead addresses
The most common form of black hole is simply an IP address that specifies a host machine that is not running or an address to which no host has been assigned.
Even though TCP/IP provides means of communicating the delivery failure back to the sender via ICMP, traffic destined for such addresses is often just dropped.
Note that a dead address will be undetectable only to protocols that are both connectionless and unreliable (e.g., UDP). Connection-oriented or reliable protocols (TCP, RUDP) will either fail to connect to a dead address or will fail to receive expected acknowledgements.
Firewalls and "stealth" ports
Black hole (disambiguation)
A black hole is an object with sufficient density that the force of gravity prevents anything from escaping from it except through quantum tunneling behavior.
Black hole may also refer to:
Computing
Media
Podcasts:
Black Hole
ALBUMS
- The Best of Chill Out, Volume 3 released: 2004
- Goa Trance: Psychedelic Flashbacks released: 1998
- Goa Trance, Volume 7 released: 1997
- Chill And 80's - 12 Exclusive Chill Out Eighties Remixes released:
Black∞Hole
ALBUMS
- DanceDanceRevolution ULTIMATE DANCE COLLECTION released: 2010
- DanceDanceRevolution SuperNOVA2 Original Soundtrack released: 2008
- hope released:
DanceDanceRevolution ULTIMATE DANCE COLLECTION
Released 2010- A Brighter Day
- TRUE♥LOVE
- Confession
- Touchin'
- Unreal
- 華爛漫 -Flowers-
- the beat
- Fly away -mix del matador-
- Hold Tight
- Taking It To The Sky
- switch
- MOONSTER
- Here I Go Again
- Love Again
- Moving On
- puzzle
- Sacred Oath
- THIS NIGHT
- SUNKiSS♥DROP
- Be With You (Still Miss you)
- Silver Platform - I wanna get your heart -
- Heavens and the Earth
- Trust -DanceDanceRevolution mix-
- THE REASON
- dream of love
- Beautiful Inside (Cube::Hard mix)
- Vem brincar
- STARS☆☆☆（Re-tuned by H∧L）-DDR EDITION-
- The flower in your smile
- Shine
- Why not
- A thing called LOVE
- Here I Go Again (full version)
- Beautiful Inside (Cube::Hard mix) (full version)
- the beat (full version)
- TRUE♥LOVE (Clubstar's True club mix)
DanceDanceRevolution SuperNOVA2 Original Soundtrack
Released 2008- switch
- Freeway Shuffle
- Electrified
- Why not
- A thing called LOVE
- Trust -DanceDanceRevolution mix-
- dream of love
- Every Day,Every Night (NM STYLE)
- Music In The Rhythm
- Vem brincar
- Shades of Grey
- SUNKiSS♥DROP
- GIRIGILI門前雀羅
- stealth
- Votum stellarum -forest 25 DDR RMX-
- volcano
- L'amour et la liberte (Darwin & DJ Silver remix)
- STARS☆☆☆ (Re-tuned by HΛL) -DDR EDITION-
- 木星～組曲『惑星』より
- Saturn
- Uranus
- Poseidon
- Pluto
- Pluto Relinquish
- Unreal
- NGO
- PARANOiA ～HADES～
- TRIP MACHINE PhoeniX
- Malacca
- dazzle
- The flower in your smile
- puzzle
- TimeHollow
- S･A･G･A
- Music In The Rhythm (original size)
- Baby's Tears (スカイガールズオープニングテーマ) (original size)
Black Hole
ALBUMS
- Disco Diva Delights, Volume 1 released: 2009
Black Hole
ALBUMS
- Land of Mystery released: 1985
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by Beck
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by Utopia
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by Girls Against Boys
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by Jimi Tenor
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by Rosebuds
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by Abomino Aetas
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by Lindsay Lohan
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by Germ Bomb
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by Creeper Lagoon
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by Aqualung
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by Atlas Losing Grip
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by Samael
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by Spock
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by Be Your Own Pet
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by Addict
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by Gun Club
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by Death In Vegas
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by The Gun Club
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by Constellation Branch
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by No Turning Back
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by Ana Johnsson
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by She & Him
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by Mental Crypt
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by Antigone Rising
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by I Nine
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by James
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by A
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by Grand Magus
Black Hole
by: BeckWindy
Windy
Looking for a better home
Gotta be
Gotta be
Running out of lightbulbs
Crowded
Crowded
Open to a wastecan
Yellow car
Yellow car
Better be inside there
Wake up
Wake up
Nothing's gonna harm you
Glass wall
Glass wall
Standing on the furniture
Little boy
Little boy
Laying on a sleeping bag
Watching
Watching
Through the cracks of his eyelids
Stranger
stranger
Feeling like a broken stone
Lost him
Lost him
Standing on the orange chairs
Alphabet
Alphabet
Can't afford a telephone
Black hole
Black hole
Nothing's gonna harm you
Latest News for: black hole
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