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In physical cosmology, the age of the universe is the time elapsed since the Big Bang: 13.8 billion years. [1]: Table 1 Astronomers have two different approaches to determine the age of the universe.
Cosmic inflation expands space by a factor of the order of 10 26 over a time of the order of 10 −36 to 10 −32 seconds. The universe is supercooled from about 10 27 down to 10 22 Kelvins. [15] The strong interaction becomes distinct from the electroweak interaction. Electroweak epoch ends 10 −12 s 10 15 K (150 GeV)
The Cosmic Calendar is a method to visualize the chronology of the universe, ... there are 438 years per cosmic second, 1.58 million years per cosmic hour, and 37.8 ...
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 ...
Most astronomers believe the universe is 13.7 billion years old. A new study says that figure could be closer to 26.7 billion.
The cosmological decade can be expressed in log years per decade. In this definition, the 100th cosmological decade lasts from 10 100 years to 10 101 years after Time Zero. To convert to this format, simply divide by seconds per year; or in logarithmic terms, subtract 7.4991116 from the values listed above.
Visual representation of the Logarithmic timeline in the scale of the universe. This timeline shows the whole history of the universe, the Earth, and mankind in one table. Each row is defined in years ago, that is, years before the present date, with the earliest times at the top of the chart. In each table cell on the right, references to ...
The observable universe is a spherical region of ... 10 −37 seconds after the Big Bang and ... when the universe was only 630 million years old. ...