This is computationally relatively easy to study. There are various scenarios for the far future and ultimate fate of the universe. Even atomic nuclei will be torn apart. Timeline of the universe. Space Exploration In The 1940’s!. The Planck epoch is an era in traditional (non-inflationary) Big Bang cosmology immediately after the event which began the known universe. Ordinary matter gathers where dark matter is denser, and in those places it collapses into clouds of mainly hydrogen gas. This caused two forces to now exist: gravity, and an electrostrong interaction. {\displaystyle (k_{B}T/\hbar c)^{3}} This change is known as inflation. A comparatively small residue of hadrons remained at about 1 second of cosmic time, when this epoch ended. It's been a long, strange trip for this universe we call home. He came up with hiliocentric which the sun was the center of the universe not the Earth. In Homer’s Iliad and Odyssey, stars and constellations are mentioned, including Orion, the Great Bear (Ursa Major), Boötes, Sirius, and the Pleiades. Therefore, the energy of the universe, and its overall behaviour, is dominated by its photons. [25], Therefore, the only stable nuclides created by the end of Big Bang nucleosynthesis are protium (single proton/hydrogen nucleus), deuterium, helium-3, helium-4, and lithium-7. Although a specific "inflationary epoch" is highlighted at around 10−32 seconds, observations and theories both suggest that distances between objects in space have been increasing at all times since the moment of the Big Bang, and are still increasing (with the exception of gravitationally bound objects such as galaxies and most clusters, once the rate of expansion had greatly slowed). Some of the CMB fluctuations were roughly regularly spaced, because of the effect of baryonic acoustic oscillations. [25], At approximately 1 second after the Big Bang neutrinos decouple and begin travelling freely through space. As expansion continues, the universe becomes larger, colder, and more dilute; in time, all structures eventually decompose to subatomic particles and photons. Our trip through the timeline of the history of astronomy now takes us to Torun, a small city in present day Poland, in 1473. The decoupled photons would have filled the universe with a brilliant pale orange glow at first, gradually redshifting to non-visible wavelengths after about 3 million years, leaving it without visible light. One of these predictions is that neutrinos will have left a subtle imprint on the CMB. Follow its … Eventually, the outward and repulsive effect of dark energy begins to dominate over the inward pull of gravity. Timeline of the evolutionary history of life, Graphical timeline from Big Bang to Heat Death, Graphical timeline of the Stelliferous Era, Friedmann–Lemaître–Robertson–Walker (FLRW) metric, suddenly and very rapidly changed in scale, List of the most distant astronomical objects, "The habitable epoch of the early Universe", "The age of the Galactic thin disk from Th/Eu nucleocosmochronology - III. It is still expanding today. View Astronomy Timeline.pdf from ANALYTICS 602.AO2 at University of Southern Indiana. Going forward, this provides a model of the universe which matches all current physical observations extremely closely. From about 9.8 billion years of cosmic time,[7] the universe's large-scale behaviour is believed to have gradually changed for the third time in its history. These phase transitions in the universe's fundamental forces are believed to be caused by a phenomenon of quantum fields called "symmetry breaking". Many different ancient cultures developed mythology based upon the cosmos. Ionized hydrogen does not have electron energy levels of this kind. As a result, the universe was opaque or "foggy". Random fluctuations could lead to some regions becoming dense enough to undergo gravitational collapse, forming black holes. 2 The electromagnetic and weak interaction have not yet separated, and as far as we know all particles were massless, as the Higgs mechanism had not operated yet. The only photons (electromagnetic radiation, or "light") in the universe were those released during decoupling (visible today as the cosmic microwave background) and 21 cm radio emissions occasionally emitted by hydrogen atoms. Could not travel significant distances without interacting with ionized particles 2020 - Explore Lindsay Heilner 's board `` universe! ; this could be provided by naturally-occurring geothermal energy. ). [ 65.... 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