Age of the universe | Wikipedia audio article
Channel: wikipedia tts
Date: 2018-12-08

This is an audio version of the Wikipedia Article:
Age of the universe


00:00:49 1 Explanation
00:02:30 2 Observational limits
00:03:05 3 Cosmological parameters
00:05:51 4 WMAP
00:06:27 5 Planck
00:08:12 6 Assumption of strong priors
00:09:26 7 History
00:10:03 8 See also
00:12:04 9 References



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- Socrates



SUMMARY
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In physical cosmology, the age of the universe is the time elapsed since the Big Bang. The current measurement of the age of the universe is 13.799±0.021 billion (109) years within the Lambda-CDM concordance model. The uncertainty has been narrowed down to 21 million years, based on a number of projects that all give extremely close figures for the age. These include studies of the microwave background radiation, and measurements by the Planck satellite, the Wilkinson Microwave Anisotropy Probe and other probes. Measurements of the cosmic background radiation give the cooling time of the universe since the Big Bang, and measurements of the expansion rate of the universe can be used to calculate its approximate age by extrapolating backwards in time.