History of physical cosmology | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-24

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Physical_cosmology


00:01:53 1 Subject history
00:06:27 2 Energy of the cosmos
00:09:51 3 History of the universe
00:10:17 3.1 Equations of motion
00:11:03 3.2 Particle physics in cosmology
00:12:11 3.3 Timeline of the Big Bang
00:13:27 4 Areas of study
00:13:50 4.1 Very early universe
00:16:04 4.2 Big Bang Theory
00:17:17 4.2.1 Standard model of Big Bang cosmology
00:17:50 4.3 Cosmic microwave background
00:20:18 4.4 Formation and evolution of large-scale structure
00:22:23 4.5 Dark matter
00:23:29 4.6 Dark energy
00:26:24 4.7 Gravitational waves
00:27:33 4.8 Other areas of inquiry



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SUMMARY
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Physical cosmology is a branch of cosmology concerned with the studies of the largest-scale structures and dynamics of the Universe and with fundamental questions about its origin, structure, evolution, and ultimate fate.  Cosmology as a science originated with the Copernican principle, which implies that celestial bodies obey identical physical laws to those on Earth, and Newtonian mechanics, which first allowed us to understand those physical laws. Physical cosmology, as it is now understood, began with the development in 1915 of Albert Einstein's general theory of relativity, followed by major observational discoveries in the 1920s: first, Edwin Hubble discovered that the universe contains a huge number of external galaxies beyond our own Milky Way; then, work by Vesto Slipher and others showed that the universe is expanding. These advances made it possible to speculate about the origin of the universe, and allowed the establishment of the Big Bang Theory, by Georges Lemaître, as the leading cosmological model. A few researchers still advocate a handful of alternative cosmologies; however, most cosmologists agree that the Big Bang theory explains the observations better.
Dramatic advances in observational cosmology since the 1990s, including the cosmic microwave background, distant supernovae and galaxy redshift surveys, have led to the development of a standard model of cosmology. This model requires the universe to contain large amounts of dark matter and dark energy whose nature is currently not well understood, but the model gives detailed predictions that are in excellent agreement with many diverse observations.Cosmology draws heavily on the work of many disparate areas of research in theoretical and applied physics. Areas relevant to cosmology include particle physics experiments and theory, theoretical and observational astrophysics, general relativity, quantum mechanics, and plasma physics.