Multicolor Light Curve Shape Method
Riess develops improved light-curve techniques for standardizing Type Ia supernova luminosities and reducing uncertainty in cosmological distance estimates.
Historical biography archive · Updated 2026-11-03
Adam Guy Riess Biography and Timeline
Follow Adam Guy Riess through 12 dated historical records for United States of America.
Adam Guy Riess, historical timeline
A chronological timeline drawn from matching World History Database records.
12Distinct records
1 of 1Page
1996–2023Years on this page
1996
1998
Accelerating Universe Paper
Riess leads the analysis reporting observational evidence from Type Ia supernovae for an accelerating universe and a positive cosmological constant.
Dark Energy
Riess measures distant supernovae showing cosmic acceleration, adding dark energy to Big Bang cosmology
2004
Cosmic Transition from Deceleration
Riess uses very distant Type Ia supernovae to identify evidence that the universe once decelerated before dark energy became dominant and expansion began accelerating.
2006
Dark Energy Detected in Young Universe
Riess uses distant Hubble supernovae to trace acceleration farther back in time and strengthen evidence that dark energy behaves approximately like a cosmological constant.
2009
Hubble Constant Narrows Dark Energy Models
Riess improves the Hubble constant measurement, reducing the range of dark-energy models allowed when local expansion data are combined with early-universe observations.
2011
Nobel Prize for Dark Energy Discovery
Riess shares the 2011 Nobel Prize in Physics for the supernova observations that revealed the accelerating expansion associated with dark energy.
2016
Improved Local Expansion Rate
Riess and the SH0ES collaboration improve the local Hubble constant measurement, sharpening comparisons between the late universe and cosmological models containing dark energy.
2019
Hubble Tension Strengthened
Riess reports increasingly precise local expansion measurements that intensify the Hubble tension and motivate tests of whether new physics affects standard dark-energy cosmology.
2021
Hubble Constant
Riess improves local Hubble constant measurements and highlights tension with early universe predictions
2022
Hubble Expansion Milestone
Riess uses an expanded Hubble distance-ladder sample to strengthen the local expansion-rate measurement and the discrepancy with early-universe Lambda-CDM predictions.
2023
Hubble Constant
Riess uses new observations to continue testing the expansion rate of the Big Bang universe
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.