After THE BING BANG... by claude19
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Description
L’expansion induit naturellement que l’univers a été plus dense par le passé. À l’instar d’un gaz qui s’échauffe quand on le comprime, l’univers devait aussi être plus chaud par le passé. Cette possibilité semble évoquée pour la première fois en 1934 par Georges Lemaître, mais n’est réellement étudiée qu’à partir des années 1940. Selon l’étude de George Gamow (entre autres), l’univers doit être empli d’un rayonnement qui perd de l’énergie du fait de l’expansion, selon un processus semblable à celui du décalage vers le rouge du rayonnement des objets astrophysiques distants.
Gamow réalise en effet que les fortes densités de l’univers primordial doivent avoir permis l’instauration d’un équilibre thermique entre les atomes, et par suite l’existence d’un rayonnement émis par ceux-ci. Ce rayonnement devait être d’autant plus intense que l’univers était dense, et devait donc encore exister aujourd’hui, bien que considérablement moins intense. Gamow fut le premier (avec Ralph Alpher et Robert C. Herman) à réaliser que la température actuelle de ce rayonnement pouvait être calculée à partir de la connaissance de l’âge de l’univers, la densité de matière, et l’abondance d’hélium.
Ce rayonnement est appelé aujourd’hui fond diffus cosmologique, ou parfois rayonnement fossile. Il correspond à un rayonnement de corps noir à basse température (2,7 kelvins), conformément aux prédictions de Gamow. Sa découverte, quelque peu fortuite, est due à Arno Allan Penzias et Robert Woodrow Wilson en 1965, qui seront récompensés par le Prix Nobel de physique en 1978.
The expansion leads naturally that the universe was denser in the past. Like a gas heats when it is compressed, the universe would be warmer in the past. This appears raised for the first time in 1934 by Georges Lemaître, but not really explored until the 1940s. According to the study of George Gamow (among others), the universe must be filled with a radiation loses energy due to expansion, a process similar to the redshift of radiation from objects astrophysical remote.
Gamow realized indeed that high densities of the early universe must have seen the establishment of thermal equilibrium between atoms, and hence the existence of a radiation emitted by them. This radiation would be more intense than the universe was dense, and was therefore still exist today, although considerably less intense. Gamow was the first (with Ralph Alpher and Robert Herman C.) to realize that the current temperature of this radiation could be calculated from knowledge of the age of the universe, the matter density and abundance ofhelium.
This radiation is now called cosmic microwave background or CMB sometimes. It corresponds to a blackbody radiation at low temperature (2.7K), according to predictions of Gamow. His discovery, somewhat fortuitous, due to Arno Penzias and Robert Woodrow Wilson in 1965, which will be awarded the Nobel Prize for Physics in 1978.
from WIkipedia, l’Encyclopédie Libre
Comments (32)
A_Sunbeam
Magnificent in full size! Great piece of work.
Hubert
Perfect title! During the first time of its existence, the Universe was possibly too dense to see anything, even colors. ;)
fractalbeke
Fractal et texte font un parfait ensemble... agréable à regarder et intéressant à lire.
junilau
Hoo waou des couleurs lumineuses une magnifique compo bravo je suis sous le charme et BONNE ANNEE !
KataPan
Le grand pan dans le commencement de l’univers, c’est un miroir bien coloré qui reflète notre âme. Superbe !
farmerC
Very beautiful work.
jmb007
il y avait de superbe couleurs a l'epoque!!!que veut tu tout se perd!! magnifique image!! la neige s"est transformer en pluie,on n'a pas pu rigoler!!dommage! a bientot bonne journee!!
flavia49
marvelous image!!
peedy
Great colors. Corrie
mmax.ch
Excellent colors and view.
MrsRatbag
Rich colour and beautiful movement!
mgtcs
Wonderful colors and shapes, great work as usual, love the title,! 10+
moni2000
Beautiful work!
LivingPixels
As as always creative and full of life radiating energy beautiful to our eyes well done claude!
Fractal_Ken
Wow! It's a wonderfully colorful universe.
carlx
Very cool work, Claude!!!
Dreamingbee
wow claude - another fantastic work !
SIGMAWORLD
Excellent fractal!
e-brink
Very impressive work and presentation.
mnmpm
wow !!!! you have the time to put an image a day, Excellent!!
lyron
Great explosion!!! Fantastic work!!!
sandra46
SUPERB COMPOSITION!!!!
iceberg5
A very happy New Year to you also Claude ! I like your image and you have shown the immense energy and radiation that was emitted during those billionth's of a second after the Big Bang !
jocko500
yes this is super cool looking. love the colors
Richardphotos
a take notice flame.the colors are outstanding
anaber
Superb colouring and luminousity! A mix of power and energy! BEAUTIUL! Great performance, as always!!
amota99517
This is such an exciting piece. Marvelous work!
watchman2005
Great idea, wonderful design!!!
MagikUnicorn
SUPER COOL
three_grrr
WOW! This is magnificent! The colors just pop! It is the colors I think that make it so 3 dimensional also, such awesome depth and oh my goodness, when it's full size it is breathtaking! The title and the information fit this image perfectly .. I think you have traveled back in time to capture this!