Adam Guy Riess Biography

Riess develops improved light-curve techniques for standardizing Type Ia supernova luminosities and reducing uncertainty in cosmological distance estimates.

Riess leads the analysis reporting observational evidence from Type Ia supernovae for an accelerating universe and a positive cosmological constant.

Riess measures distant supernovae showing cosmic acceleration, adding dark energy to Big Bang cosmology

Riess uses very distant Type Ia supernovae to identify evidence that the universe once decelerated before dark energy became dominant and expansion began accelerating.

Riess uses distant Hubble supernovae to trace acceleration farther back in time and strengthen evidence that dark energy behaves approximately like a cosmological constant.

Riess improves the Hubble constant measurement, reducing the range of dark-energy models allowed when local expansion data are combined with early-universe observations.

Riess shares the 2011 Nobel Prize in Physics for the supernova observations that revealed the accelerating expansion associated with dark energy.

Riess and the SH0ES collaboration improve the local Hubble constant measurement, sharpening comparisons between the late universe and cosmological models containing dark energy.

Riess reports increasingly precise local expansion measurements that intensify the Hubble tension and motivate tests of whether new physics affects standard dark-energy cosmology.

Riess improves local Hubble constant measurements and highlights tension with early universe predictions

Riess uses an expanded Hubble distance-ladder sample to strengthen the local expansion-rate measurement and the discrepancy with early-universe Lambda-CDM predictions.

Riess uses new observations to continue testing the expansion rate of the Big Bang universe