A Younger Age for the Universe

Details A Younger Age for the Universe A Younger Age for the Universe

1999-11-29

arxiv.org/abs/astro-ph/9911493v1

Science 284:1503-1507,1999

Astronomy and Astrophysics

Astrophysics

14 pages, including 5 figures, also available at http://nedwww.ipac.caltech.edu/level5/Lineweaver/frames.html

Scientific paper

10.1126/science.284.5419.1503

The age of the universe in the Big Bang model can be calculated from three parameters: Hubble's constant, h; the mass density of the universe, Omega_m; and the cosmological constant, Omega_lambda. Recent observations of the cosmic microwave background and six other cosmological measurements reduce the uncertainty in these three parameters, yielding an age for the universe of 13.4 +/- 1.6 billion years, which is a billion years younger than other recent age estimates. A different standard Big Bang model, which includes cold dark matter with a cosmological constant, provides a consistent and absolutely time-calibrated evolutionary sequence for the universe.

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