Allan Rex Sandage1969
Sandage continues refining the expansion rate, an essential parameter for Big Bang age estimates
United States of America · Science / Astronomy. Chronological records rendered directly from the World History Database.
Sandage continues refining the expansion rate, an essential parameter for Big Bang age estimates
Refines distance ladder measurements that test the expansion history of the Big Bang universe.
Riess improves local Hubble constant measurements and highlights tension with early universe predictions
Freedman compares alternative distance indicators to investigate the Hubble constant tension
Riess uses new observations to continue testing the expansion rate of the Big Bang universe
This factsheet is generated from stored World History Database records matching the country, broad category, detailed category and exact Event value shown above. Duplicate display records are collapsed; database wording is otherwise preserved. Source provenance varies by record, so formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.