Earth-Sun Distance Estimate
Supports an improved estimate of the distance between Earth and Sun.
Historical biography archive · Updated 2026-11-03
Jean Richer Biography and Timeline
Follow Jean Richer through 2 dated historical records for France.
Jean Richer, historical timeline
A chronological timeline drawn from matching World History Database records.
2Distinct records
1 of 1Page
1672–1672Years on this page
1672
Mars Parallax Expedition
Observes Mars from Cayenne for comparison with measurements in France.
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.