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1. en.wikipedia.org › wiki › Chronology_of_the_universeChronology of the universe - Wikipedia

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   22 hours ago · This time happens to correspond roughly to the time of the formation of the Solar System and the evolutionary history of life. Stelliferous Era: 150 Ma ~ 100 Ta: 20 ~ −0.99: 60 K ~ 0.03 K: The time between the first formation of Population III stars until the cessation of star formation, leaving all stars in the form of degenerate remnants ...

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   How long did it take for Earth to form?

   • The thin disk of our galaxy began to form at about 5 billion years (8.8 Gya ), and the Solar System formed at about 9.2 billion years (4.6 Gya), with the earliest traces of life on Earth emerging by about 10.3 billion years (3.5 Gya).

   Chronology of the universe - Wikipedia

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   What was the temperature of the universe at the time?

   • The entire universe would have appeared as a brilliantly glowing fog of a color similar to this and a temperature of 4000 K, at the time. The photons released by these newly formed hydrogen atoms initially had a temperature/energy of around ~ 4000 K.

   Chronology of the universe - Wikipedia

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   Did time exist before the chronology?

   • It is generally considered meaningless or unclear whether time existed before this chronology:

   Chronology of the universe - Wikipedia

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   What is the chronology of the universe?

   • 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.

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