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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 ...
The age of the universe by redshift z=5 to 20. For early objects, ... The quark epoch ended when the universe was about 10 −5 seconds old, ...
The Cosmic Calendar is a method to visualize the chronology of the universe, scaling its currently understood age of 13.8 billion years to a single year in order to help intuit it for pedagogical purposes in science education or popular science.
434.8 Ps (13.787 Ga): The approximate age of the Universe. 10 18: exasecond: Es future cosmological time All times of this length and beyond are currently theoretical as they surpass the elapsed lifetime of the known universe. 1.08 Es (+34 Ga): Time to the Big Rip according to some models, but this is not favored by existing data.
c. 10 −43 seconds: Grand unification epoch begins: While still at an infinitesimal size, the universe cools down to 10 32 kelvin. Gravity separates and begins operating on the universe—the remaining fundamental forces stabilize into the electronuclear force, also known as the Grand Unified Force or Grand Unified Theory (GUT), mediated by (the hypothetical) X and Y bosons which allow early ...
The age of the universe as estimated from the Hubble expansion and the CMB ... 10 −43 seconds, [1] the fact that the universe has reached neither a heat death nor a ...
Explore the universe with news on fascinating discoveries, ... Exacting the measurement of seconds also grew more complicated in the early 1900s, thanks to Albert Einstein, ...
This is a timeline of the Universe from the Big Bang to the heat death scenario. The different eras of the universe are shown. The heat death will occur in around 1.7×10 106 years, if protons decay .