2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106781This is a review article for The Review of Particle Physics 2006 (aka the Particle Data Book). It forms a compact review of knowledge of the cosmological parameters as at May 2006. Topics included are Parametrizing the Universe; Extensions to the standard model; Probes; Bringing observations together; Outlook for the future.25 pages TeX file. Article for The Review of Particle Physics 2006 (aka the Particle Data Book), published version at http://pdg.lbl.gov/ . This article supersedes astro-ph/0406681. Updated to match published version. Includes WMAP3 resultsAstrophysicstext