Article for The Review of Particle Physics 2020 (aka
the Particle Data Book). Oline version at
http://pdg.lbl.gov/2019/astrophysics-cosmology/astro-cosmo.html.
https://arxiv.org/abs/1912.03687
Abstract: This is a review article for The Review of Particle Physics 2020 (aka the Particle Data Book). It forms a compact review of knowledge of the cosmological parameters at the end of 2019. Topics included are Parametrizing the Universe; Extensions to the standard model; Probes; Bringing observations together; Outlook for the future.