Ionized Hydrogen Region Theory
Defines the characteristic volume now known as a Stromgren sphere.
Historical biography archive · Updated 2026-11-03
Bengt Georg Daniel Stromgren Biography and Timeline
Follow Bengt Georg Daniel Stromgren through 4 dated historical records for Denmark.
Bengt Georg Daniel Stromgren, historical timeline
A chronological timeline drawn from matching World History Database records.
4Distinct records
1 of 1Page
1939–1956Years on this page
1939
Stromgren Sphere
Models ionized hydrogen regions surrounding hot stars.
1956
Stromgren Photometry
Creates photometric indices measuring stellar temperature, gravity and chemical composition.
uvby Photometric System
Develops a four-colour system for precise stellar classification.
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.