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Q. About 300,000 years later the temperature decreased to 10,000 K and the first simple atoms formed. [2012] 1. According to the Big Bang theory, the universe began about 13.7 billion years ago. The more dark matter there is in the universe, the more likely it would be that the universe would have a closed geometry, and that the universe would end in a Big Crunch. On small scales, like the scales of living creatures and … Expanding universe, dynamic state of the extragalactic realm, the discovery of which transformed 20th-century cosmology. The accelerating expansion of the universe is the observation that the expansion of the universe is such that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time.. In this activity, students examine the first line of evidence, galactic motion, for the notion of an expanding universe. The current cosmological consensus is that the universe began 13.7 billion years ago with the Big Bang. Everything that is now in the universe was squeezed into a very small volume. 2 Tim Schrabback et al. The development of general relativity and its application to cosmology by German-born physicist Albert Einstein, Dutch mathematician Willem de Sitter, and other theoreticians, This expansion, usually referred to as the "metric expansion" of space, is a “broad-brush effect” in that individual galaxies themselves are not expanding, but the clusters of galaxies into which the matter of the universe has become divided are becoming more widely separated and more thinly spread throughout space. Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of universe? There are various attempts to explain dark energy, ranging from Einstein’s cosmological constant, via a dynamic fluid named By examining the spectrum of light from a galaxy, students can determine whether a galaxy is moving toward or away from us, and how fast. NUMBER OF GEOGRAPHY QUESTIONS IN UPSC PRELIMS 25 YEARS PAPERS INSIGHTS & STRATEGY. But a legendary physicist says he's found the first evidence of an eternal, cyclic cosmos. Evidence for expansion of the Universe www.civilstap.com. The reason for this is that there are other physical phenomena at play besides the Universe's expansion. Detection of microwaves in space 2. Imagine all of the known universe in a single, hot, chaotic mass. The subsequent history of the Universe involved continued cooling, continued expansion and a decrease in average density, and the condensation of dust and gas into … : Evidence for the accelerated expansion of the Universe from 3D weak lensing with COSMOS scales and contributes ∼ 70% to the total energy budget today. Dark matter in the universe exerts a gravitational pull in the expanding universe. An enormous explosion—a big bang—caused the universe to start expanding rapidly. The Universe of a few billion years ago was a few degrees warmer than it is now, exactly as the Big Bang Theory predicts," said research team leader Dr …

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