Finite Speed of Light from Io Eclipses
Uses timing variations in eclipses of Io to show that light travels at a finite speed.
Permanent historical records · Updated 2026-11-03
1676 in Denmark
Explore 3 historical events and records for Denmark in 1676.
Historical records for Denmark in 1676
Sorted by month and day. Records with no month are shown last. Showing 3 of 3 unique records.
3Unique records
1 of 1Page
3Named events on this page
2Named people on this page
1Places on this page
Other events (month unknown)
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.
Speed of Light
Uses eclipses of Io to estimate that light travels at finite speed.
How these records were prepared
Generated from the World History Database historical_events table. Identical display records are collapsed; descriptions otherwise retain the stored text. Coverage and source quality vary. Check primary and specialist sources before citing individual historical claims.