The chronology of the universe describes the history and future of the universe according to big bang cosmology the earliest stages of the universes existence are estimated as taking place 138 billion years ago with an uncertainty of around 21 million years at the 68 confidence level. History of the universe posted 092804 nova explore the past present and future of our cosmos stretching from the big bang some 10 to 20 billion years ago to the time 10 100 years in the . We start out with the beginning of everything the big bang which gave rise to the universe 138 billion years ago the event birthed the oldest known star in the universe methuselah located about 1901 light years away from earth. The universe is a simple place vast stretches of space filled with nothingness yet as it developed over billions of years it grew increasingly complex this is a central concept big history will emphasize the ever increasing complexity of the universe another central theme in big history is goldilocks conditions
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