Earth size accurate

Improvement over Eratosthenes' estimate based on distance of a star from zenith at different places using the help of telescopes. Estimate for radius was 3950 miles (actual 3,958.8)
 Jean Picard France 1684 Earth size accurate

Improvement over Eratosthenes' estimate based on distance of a star from zenith at different places using the help of telescopes. Estimate for radius was 3950 miles (actual 3,958.8)