1956Stromgren PhotometryBengt Georg Daniel Stromgren
Creates photometric indices measuring stellar temperature, gravity and chemical composition.
Historical records for Denmark in 1956, rendered directly from the World History Database and ordered by month, day and event.
Creates photometric indices measuring stellar temperature, gravity and chemical composition.
Develops a four-colour system for precise stellar classification.
This page is generated from stored World History Database records matching the exact country and year shown above. Exact duplicate display records are collapsed. Records without a month are listed after the monthly sections. Source provenance varies by record; formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.