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автор  дата 09.01.2019
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The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution. The model accounts for the fact that the universe expanded from a very high density and high temperature state, and offers a comprehensive explanation faor a broad range of phenomena, including the abundance of light elements, the cosmic microwave background, large scale structure and Hubble's Law.If the known laws of physics are extrapolated to the highest density regime, the result is a singularity which is typically associated with the Big Bang. Detailed measurements of the expansion rate of the universe place this moment at approximately 13.8 billion years ago, which is thus considered the age of the universe. After the initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant clouds of these primordial elements later coalesced through gravity in halos of dark matter, eventually forming the stars and galaxies visible today. Timeline of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. On the left the dramatic expansion occurs in the inflationary epoch, and at the center the expansion accelerates (artist's concept; not to scale). Since Georges Lemaître first noted in 1927 that an expanding universe could be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, empirical evidence provides strong support for the former.[8] In 1929, from analysis of galactic redshifts, Edwin Hubble concluded that galaxies are drifting apart; this is important observational evidence consistent with the hypothesis of an expanding universe. In 1965 the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang model,[9] since that theory predicted the existence of background radiation throughout the universe before it was discovered. More recently, measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence.[10] The known physical laws of nature can be used to calculate the characteristics of the universe in detail back in time to an initial state of extreme density and temperature.[11] The Big Bang theory developed from observations of the structure of the universe and from theoretical considerations. In 1912 Vesto Slipher measured the first Doppler shift of a "spiral nebula" (spiral nebula is the obsolete term for spiral galaxies), and soon discovered that almost all such nebulae were receding from Earth. He did not grasp the cosmological implications of this fact, and indeed at the time it was highly controversial whether or not these nebulae were "island universes" outside our Milky Way.[37][38] Ten years later, Alexander Friedmann, a Russian cosmologist and mathematician, derived the Friedmann equations from Albert Einstein's equations of general relativity, showing that the universe might be expanding in contrast to the static universe model advocated by Einstein at that time.[39] In 1924 Edwin Hubble's measurement of the great distance to the nearest spiral nebulae showed that these systems were indeed other galaxies. Independently deriving Friedmann's equations in 1927, Georges Lemaître, a Belgian physicist and Roman Catholic priest, proposed that the inferred recession of the nebulae was due to the expansion of the universe.[40] In 1931 Lemaître went further and suggested that the evident expansion of the universe, if projected back in time, meant that the further in the past the smaller the universe was, until at some finite time in the past all the mass of the universe was concentrated into a single point, a "primeval atom" where and when the fabric of time and space came into existence.[41] Starting in 1924, Hubble painstakingly developed a series of distance indicators, the forerunner of the cosmic distance ladder, using the 100-inch (2.5 m) Hooker telescope at Mount Wilson Observatory. #Universe #Space #Documentary
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автор  дата 15.04.2011
Moonshine Jungle Tour 2014 tickets and more info: http://www.brunomars.com/moonshinejungletour Available now on iTunes! http://smarturl.it/Doo-Wops ...
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автор  дата 28.09.2016
Starboy ft. Daft Punk (Official Video) Taken from the new album Starboy http://theweeknd.co/StarboyYD Connect with The Weeknd: ...
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автор  дата 23.03.2009
Song by Bryant Oden. Video by Forrest Whaley. iOS app out now! Works on iPod Touch, iPad, & iPhone...
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Subscribe NOW to The Breakfast Club: http://ihe.art/xZ4vAcA Get MORE of The Breakfast Club: ▻ WATCH MORE: ...
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автор  дата 14.01.2019
Music video by The Killers performing Land Of The Free. © 2019 Island Records, a division of UMG Recordings, Inc. http://vevo.ly/vXcrmB.
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автор  дата 24.05.2018
Bounce along in the bus all over town with this favorite nursery rhyme! https://www.youtube.com/c/Cocomelon?sub_confirmation=1 WEBSITE: http://www.
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автор  дата 08.03.2018
"Camila" album available at: Spotify http://smarturl.it/Camila_Sptfy Apple Music http://smarturl.it/Camila_AM iTunes http://smarturl.it/Camila_iTunes Google Play ...
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автор  дата 14.01.2019
Bullying. Harassment. Is this the best a man can get? It's only by challenging ourselves to do more, that we can get closer to our best. To say the right thing, to act ...
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автор  дата 12.04.2018
Call Out My Name (Official Video) Taken from the album My Dear Melancholy, http://theweeknd.co/mdmYD Connect with The Weeknd: ...
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автор  дата 16.01.2019
Rachel Nichols, Brian Windhorst and Tracy McGrady of The Jump react to Warriors vs. Nuggets, in which Golden State dropped 51 first-quarter points on Denver ...
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автор  дата 10.04.2018
The Meg Trailer 1 (2018) Jason Statham, Ruby Rose Megalodon Shark Movie HD [Official Trailer] Check out the new trailer for The Meg and be sure to ...
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автор  дата 16.12.2016
TROLLS (Original Motion Picture Soundtrack) out now! iTunes: http://smarturl.it/Trolls?IQid=dwyt Spotify: http://smarturl.it/StreamTrollsOST?IQid=dwyt Amazon: ...
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автор  дата 27.10.2017
The official audio of "The Greatest Show" by The Greatest Showman Cast from 'The Greatest Showman Soundtrack'. 'The Greatest Showman Soundtrack' ...
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автор  дата 16.01.2019
Rachel Nichols, Tracy McGrady and Scottie Pippen of The Jump discuss a number of topics, including Brooklyn Nets guard D'Angelo Russell saying he should ...
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автор  дата 27.12.2018
Presenting official trailer of The Accidental Prime Minister. In cinemas, January 11th 2019. A film based on the book "The Accidental Prime Minister" by Mr.
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автор  дата 08.03.2018
The Grinch - Official Trailer In Theaters November 9 https://www.grinchmovie.com For their eighth fully animated feature, Illumination and Universal Pictures ...
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Nick Wright and Colin Cowherd discuss the Kansas City Chiefs vs. New England Patriots and reports that Los Angeles Lakers owner, Jeanie Buss, would ...
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автор  дата 15.01.2019
Đây là game THE WALKING DEAD 4 chơi trên kênh Trực Tiếp Game của tôi - Dũng CT. Rất mong nhận được sự ủng hộ của ae. ++ Đăng ký theo dõi kênh tại ...
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