Jean Picard
Jean-Felix Picard (July 21, 1620 – July 12, 1682) was a French astronomer and priest born in La Fleche. He was the first person to measure the size of the Earth to a reasonable degree of accuracy, for which he is honored with a pyramid at Juvisy-sur-Orge. Guided by Maurolycus' methodology for doing so, Picard achieved this by measuring one degree of latitude along the Paris Meridian using triangulation. His measurements produced a result of between 111 and 112 km for one degree of latitude, which gives a corresponding terrestrial radius of 6372 km. The polar radius has now been measured at 6357 km. ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
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July 21: July 21 is the 202nd day (203rd in leap years) of the year in the Gregorian Calendar, with 163 days remaining.... July 12: July 12 is the 193rd day (194th in leap years) of the year in the Gregorian Calendar, with 172 days remaining.... French: French can refer to more than one article:... Jean Picard related Images and Photos (experimental) | ~ Table of Content ~
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~ Related Subjects ~July 12 (2) - Leap year (2) - July 21 (2) - Gregorian Calendar (2) - Juvisy-sur-Orge (1) - Maurolycus' (1) - Paris (1) - 1682 (1) - 1620 (1) - French (1) - La Fleche (1) - Astronomer (1) -~ Community ~
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