Finite Speed of Light from Io Eclipses
Uses timing variations in eclipses of Io to show that light travels at a finite speed.
Role range: 1644-1710
Historical biography archive · Updated 2026-11-03
Ole Romer Biography and Timeline
Follow Ole Romer through 2 dated historical records for Denmark.
Ole Romer, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1676–1676Years on this page
1676
Romer Announces Finite Speed of Light
Ole Romer presented observations of Jupiter's moon Io that supported the conclusion that light takes time to travel.
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.