Cosmic Concordance

Abstract

Observational constraints guide one forcefully to examine models in which the matter density is substantially less than critical density. Particularly noteworthy are those which are consistent with inflation. For these models, microwave background anisotropy, large-scale structure measurements, direct measurements of the Hubble constant, $H_0$, and the closure parameter, $Ω_{\rm Matter}$, ages of stars and a host of more minor facts are all consistent with a spatially flat model having significant cosmological constant $Ω_Λ = 0.65 \pm 0.1$, $Ω_{\rm Matter} = 1 - Ω_Λ$ (in the form of ``cold dark matter&#34;) and a small tilt: $0.8< n < 1.2$. (Read comments at top of file to find out how to obtain figures.)