La Grande Déchirure by MagikUnicorn
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Description
La Grande Déchirure
Le Big Rip (« grande déchirure » en français) est un modèle cosmologique proposant un scénario inhabituel de la fin de l'univers. Il prédit que la densité de celui-ci se mettra à augmenter avec le temps, et ce malgré le fait que l'univers reste en expansion. Ce modèle suppose l'existence d'une forme de matière très atypique, l'énergie fantôme, dont la principale caractéristique est de voir sa densité augmenter alors que l'expansion se poursuitnote.
Dans ce scénario, la densité de l'univers atteint une valeur infinie en un temps fini, terminant son existence par une singularité gravitationnelle où toute structure, des amas de galaxies aux atomes, sont détruits. Ce modèle a été proposé pour la première fois en 1999 par Robert R. Caldwell, le nom de Big Rip ayant été introduit par lui et ses collaborateurs Marc Kamionkowski et Nevin N. Weinberg en 2003.
Ce modèle diffère du Big Crunch, dans lequel l'expansion s'arrête pour laisser place à une phase de contraction. Dans ce dernier cas, les objets astrophysiques sont détruits car ils entrent en collision les uns avec les autres (ils sont « écrasés », d'où Big « Crunch »), alors que dans le cas du Big Rip, ils sont étirés par une expansion de plus en plus violente, jusqu'à être disloqués (ils sont « déchirés », d'où Big « Rip »).
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The Big Rip
The Big Rip is a cosmological hypothesis first published in 2003, about the ultimate fate of the universe, in which the matter of the universe, from stars and galaxies to atoms and subatomic particles, is progressively torn apart by the expansion of the universe at a certain time in the future.
According to the hypothesis, the scale factor of the universe and with it all distances in the universe will become infinite at a finite time in the future. It is important to note that the possibility of sudden singularities and crunch or rip singularities at late times occur only for hypothetical matter with implausible physical properties.
The hypothesis relies crucially on the type of dark energy in the universe. The key value is the equation of state parameter w, the ratio between the dark energy pressure and its energy density. At w < −1, the universe will eventually be pulled apart. Such energy is called phantom energy, an extreme form of quintessence.
A universe dominated by phantom energy expands at an ever-increasing rate. However, this implies that the size of the observable universe is continually shrinking; the distance to the edge of the observable universe which is moving away at the speed of light from any point moves ever closer. When the size of the observable universe becomes smaller than any particular structure, no interaction by any of the fundamental forces (gravitational, electromagnetic, weak, or strong) can occur between the most remote parts of the structure.
When these interactions become impossible, the structure is "ripped apart". The model implies that after a finite time there will be a final singularity, called the "Big Rip", in which all distances diverge to infinite values.
Comments (25)
MagikUnicorn
Politiquement la grande déchirure pourrais être le problème RUSSE Politically Big Rip could be the problem in RUSSIA !
MarciaGomes
Fantástica obra meu amigo bela criação,obrigado pela informação.++++++++++++5
flavia49
wonderful text and info
sandra46
SUPERLATIVE WORK!
Faemike55
Very cool work and interesting discussion
bazza
Interesting hypothesis, is that when we stay "well thats torn it, that stuffs up my plans" ?
lisalisette
Belle image et infos mon ami :)
jocko500
cool
magnus073
Magik, c'est une image dramatique. J'ai aimé apprendre (The Big Rip). Votre galerie est toujours éducatif.
mickeyrony
Pas encore des mauvaises nouvellers ssssssstiii.. Mais bon ((5++))
peedy
Excellent image and great info, MU. Corrie
bebopdlx
Well ok. This is still neat looking work.
sharky_
Need something to fix that Big RIP....Interesting post. Aloha
adrie
Cool image and work Magik.
illkirch
Interesting
Flint_Hawk
I am not sure I agree with this information, but I like your illustration!
Savage_dragon
Okay
1358
Groovular image... the way my luck runs... the big rip will occur one day before I retire... ;-)
rayag
Very interesting !
blankfrancine
I'm glad that I won't be around when either the Big Rip or Big Crunch occurs. Cool idea and render.
RodS
My brain hurts...... I need coffee... You've been hanging out with Stephen Hawking and Michio Kaku again, haven't you?? :-D Very cool stuff, Real!
evielouise
glad you explained it cause I was saying to myself what is this !~ Imagination at work magik~ cool
jendellas
Interesting!!
DennisReed
cool
Nonsolum
Ok pour ce qui concerne la matière, mais quid de l'éther...puis des âmes ?