January 1939Fission TheoryNiels Bohr
Carries news of uranium fission to the United States.
Historical records for Denmark in 1939, rendered directly from the World History Database and ordered by month, day and event.
Carries news of uranium fission to the United States.
Defines the characteristic volume now known as a Stromgren sphere.
Models ionized hydrogen regions surrounding hot stars.
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varies by record; formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.