Historical records for Netherlands in 1932, rendered directly from the World History Database and ordered by month, day and event.
Oort was studying stellar motions in the local galactic neighbourhood and found that the mass in the galactic plane must be greater than what was observed. Dark matter is postulated by Jan Oort based upon insufficient evidence, to account for the orbital velocities of stars in the Milky Way
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varies by record; formal academic citation should be checked against the relevant primary source, archive or specialist historical reference.