Age of the universe

Part of a series on
Physical cosmology
Big Bang · Universe Age of the universe Chronology of the universe
Early universe Planck epoch Grand unification epoch Quark epoch Hadron epoch Lepton epoch Photon epoch Big Bang nucleosynthesis Inflation Dark Ages Backgrounds Cosmic background radiation (CBR) Gravitational wave background (GWB) Cosmic microwave background (CMB) · Cosmic neutrino background (CNB) Cosmic infrared background (INB)
Expansion · Future Hubble's law · Redshift Expansion of the universe Accelerating expansion of the universe FLRW metric · Friedmann equations Inhomogeneous cosmology Future of an expanding universe Ultimate fate of the universe Heat death of the universe Big Rip Big Crunch Big Bounce
Components · Structure Components Lambda-CDM model Baryonic matter Energy Radiation Dark energy Quintessence Phantom energy Dark matter Cold dark matter Warm dark matter Hot dark matter Dark radiation Structure Shape of the universe Reionization · Structure formation Galaxy formation Large-scale structure Large quasar group Galaxy filament Supercluster Galaxy cluster Galaxy group Local Group Void
Experiments BOOMERanG Cosmic Background Explorer (COBE) Illustris project Planck space observatory Dark Energy Survey Euclid Large Synoptic Survey Telescope Sloan Digital Sky Survey (SDSS) 2dF Galaxy Redshift Survey ("2dF") Wilkinson Microwave Anisotropy Probe (WMAP)
Scientists Aaronson Alfvén Alpher Bharadwaj Copernicus de Sitter Dicke Ehlers Einstein Ellis Friedman Galileo Gamow Guth Hawking Hubble Lemaître Linde Mather Newton Penrose Penzias Rubin Schmidt Smoot Starobinsky Steinhardt Suntzeff Sunyaev Tolman Wilson Zel'dovich
Subject history Discovery of cosmic microwave background radiation History of the Big Bang theory Religious interpretations of the Big Bang theory Timeline of cosmological theories
v t e

In cosmology, the age of the universe is the amount of time since the Big Bang. The best measurement of the age of the Universe is 13.8 billion years (specifically, 13.798±0.037 billion years).^[1][2] The most recent and most accurate measurements were made by the Planck spacecraft. These measurements were made using the cosmic microwave background radiation and the expansion of the Universe.

A conclusion from one mathematical model, says that the age of the Universe is about 26.7 billion years: that was published July 2023 in Monthly Notices of the Royal Astronomical Society.^{[3][4][3][4][3]}"^[3]

1. ↑ Planck Collaboration (2013), Planck 2013 results. I. Overview of products and scientific results
2. ↑ Bennett C.L.; et al. (2013), Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
3. ↑ ^{3.0 3.1 3.2 3.3} Rajendra P. Gupta (7 July 2023). "JWST early Universe observations and ΛCDM cosmology". Monthly Notices of the Royal Astronomical Society. 524 (3): 3385–3395. arXiv:2309.13100. doi:10.1093/mnras/stad2032. Retrieved 22 January 2024.{{cite journal}}: CS1 maint: unflagged free DOI (link)
4. ↑ ^{4.0 4.1} Rizk, B. (13 July 2023). "New research puts age of universe at 26.7 billion years, nearly twice as old as previously believed". Phys.org. Retrieved 22 January 2024.