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The timeline of the early universe outlines the formation and subsequent evolution of the Universe from the Big Bang (13.799 ± 0.021 billion years ago) [1] to the present day. An epoch is a moment in time from which nature or situations change to such a degree that it marks the beginning of a new era or age .
The concept was popularized by Carl Sagan in his 1977 book The Dragons of Eden and on his 1980 television series Cosmos. [2] Sagan goes on to extend the comparison in terms of surface area, explaining that if the Cosmic Calendar were scaled to the size of a football field, then "all of human history would occupy an area the size of [his] hand". [3]
The chronology of the universe describes the history and future of the universe according to Big Bang cosmology. Research published in 2015 estimates the earliest stages of the universe's existence as taking place 13.8 billion years ago, with an uncertainty of around 21 million years at the 68% confidence level. [1]
The book was published in 1999. As of November 2013, Gregory Laughlin makes the following statement on his web site: [4] A large number of interesting developments have occurred in physics and astronomy since the book was written, and many of these advances have a strong impact on our understanding of how the future will unfold.
In physical cosmology, the age of the universe is the time elapsed since the Big Bang.Astronomers have derived two different measurements of the age of the universe: [1] a measurement based on direct observations of an early state of the universe, which indicate an age of 13.787 ± 0.020 billion years as interpreted with the Lambda-CDM concordance model as of 2021; [2] and a measurement based ...
A term for universe among the ancient Greek philosophers from Pythagoras onwards was τὸ πᾶν (tò pân) 'the all', defined as all matter and all space, and τὸ ὅλον (tò hólon) 'all things', which did not necessarily include the void. [33] [34] Another synonym was ὁ κόσμος (ho kósmos) meaning 'the world, the cosmos'. [35]
In “The Secret Life of the Universe: An Astrobiologist's Search for the Origins and Frontiers of Life,” readers won't walk away with a clear-cut answer to that question.
On the Origin of Time is a 2023 book by physicist Thomas Hertog about the theories of Stephen Hawking. [1] Hertog is a Belgian cosmologist working at KU Leuven university, who worked extensively with Hawking. [2] He wrote the book at Hawking's request to popularize the top-down cosmological theory that they had developed together. [3]