Jean Picard (astronomer)

Jean Picard was a 17th-century French astronomer renowned for precisely measuring Earth's size and improving astronomical observations. He accurately determined Earth's circumference using meticulous mathematics and observations, solidifying understanding of our planet's shape. Picard also improved the design of telescopes, aiding more detailed celestial observations. His work contributed to foundational advancements in astronomy and geodesy, helping scientists better understand Earth's dimensions and the universe.