Bibliographie et sources dinspiration tusclanarum disputationum. The big bang theory is the most widely accepted cosmological explanation of how the universe formed. L univers est ne a partir dun point tres dense et tres chaud. Einsteins theory of gravitation and its astronomical consequences. While the spatial size of the entire universe is unknown, it is possible to measure the size of the observable universe, which is currently estimated to be 93 billion lightyears in diameter. After only a few seconds, protons, neutrons, and electrons could form. Des lors, il permet daff cours htmlxhtml en pdf a telecharger. But if the universe is expanding, what does that say about where it was in the past. Le langage html est aujourdhui lun des principaux langages informatiques. Les premieres particules apparaissent en lire plus.
If the universe is expanding, the next logical thought is that in the past it had to have been smaller. Il est lensemble des galaxies, des constellations, des etoiles et des planetes connues ou inconnues. This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. This file is licensed under the creative commons attributionshare alike 4. According to the big bang theory, the universe began about. As the universe expanded, it became less dense and began to cool. If the file has been modified from its original state, some details may not fully reflect the modified file. In the first few moments after the big bang, the universe was unimaginably hot and dense. Before hubble, most astronomers thought that the universe didnt change. Milky way and the neighboring andromeda galaxy appear in this image, a. If we start at the present and go back into the past, the universe is contracting, getting smaller and smaller.