Earth Meridian Measurement1671
Completes a precise meridian-arc measurement north of Paris.
Historical person
Historical biography and chronological timeline for Jean Picard, based on 2 World History Database records associated with France.
Completes a precise meridian-arc measurement north of Paris.
Calculates Earths size with unprecedented seventeenth-century accuracy.
Astronomer
This biography is assembled from World History Database records filtered by country and personal-name fields. Exact duplicate display records are removed. The database is an index rather than a complete narrative biography; formal research should verify entries against relevant primary or specialist sources.