Recent results from the Supernova Cosmology Project
R. Pain
LPNHE IN2P3/CNRS, 4, place Jussieu F75252 Paris cedex 05

I report recent results from the Supernova Cosmology Project. We find observational evidence for an accelerating Universe and a positive cosmological constant from an analysis of 18 low-redshift and 42 high-redshift Type Ia supernovae. In a flat Universe, we derive a value of $\om=0.28^{+0.09}_{-0.08}~^{+0.05}_{-0.04}$ for the mass density of the Universe,where the first uncertainty is statistical and the second includes systematic effects.