The universe is commonly defined as the totality of everything that exists,[1] including any matter and energy, the planets, stars, galaxies, and the contents of intergalactic space.[2][3] comments and usage vary and desire terms include the cosmos, the world and nature. Scientific observation of presence stages in the development of the universe, which can be seen at undischarged distances, suggests that the universe has been governed by the same physical laws and constants throughout or so of its extent and history. There are various multiverse theories, in which physicists bear suggested that our universe might be one among many a(prenominal) universes that alike exist.[4][5] Contents [hide] 1 History 2 Etymology, synonyms and definitions 2.1 Broadest definition: reality and probability 2.2 definition as reality 2.3 Definition as connected space-time 2.4 Definition as plain reality 3 Size, age, contents, structure, and laws 3.1 Fine tuning 4 historical m odels 4.1 Creation 4.2 philosophical models 4.3 Astronomical models 5 Theoretical models 5.1 ordinary theory of relativity 5.2 especial(a) relativity and space-time 5.3 Solving Einsteins work equations 5.4 Big Bang model 5.
5 Multiverse theory 6 Shape of the universe 7 See also 8 Notes and references 9 Bibliography 10 make headway reading 11 outside(a) links 11.1 Videos History Throughout recorded history, some(prenominal) cosmologies and cosmogonies have been proposed to report card for observations of the universe. The earliest quantitative geocentric models were create by the superannuate d Greek philosophers. Over the centuries, mo! re very(prenominal) observations and improved theories of gravity twist to Copernicuss heliocentric model and the Newtonian model of the Solar carcass, respectively. Further improvements in astronomy led to the realization that the Solar System is embedded in a galaxy composed of billions of stars, the opaque Way, and that other galaxies exist extraneous it, as far as astronomical instruments can reach....If you motivation to get a across-the-board essay, order it on our website: BestEssayCheap.com
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