What Was Eratosthenes's Mathematical Contribution to the History of Astronomy

question 53

Multiple Choice

What was Eratosthenes's mathematical contribution to the history of astronomy, even though it was incorrect?

• A) He calculated the diameter of Earth by what he learned from travelers' itineraries.
• B) He estimated Earth's revolution rate by measuring the length of shadows casted on the surface.
• C) He determined that all the planets orbited Earth every 24 hrs.
• D) He attempted to calculate Earth's radius by utilizing the position of sunlight.
• E) He believed all of nature was underlain by musical principles.

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