The Age of the Universe

Details The Age of the Universe The Age of the Universe

1997-01-29

arxiv.org/abs/astro-ph/9701222v1

Astronomy and Astrophysics

Astrophysics

Invited lecture at the Cosmology School in Casablanca 97

Scientific paper

In this article I review the main methods for determining the age of the Universe. I describe how to determine the age of the oldest known systems at z=0, the system of galactic globular clusters, using different techniques. I also describe how to date the Universe using the decay of radioactive elements (Cosmochronology). Finally, I focus on how to determine the age of the Universe at different redshifts and specially the age of radio-quiet galaxies at high redshift. I finish by arguing that the most probable age for the Universe is $14 \pm 2$ Gyr.

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