Which famous astronomer's work did Hipparchus likely use?
Galileo
Copernicus
Eratosthenes
Kepler
Answer
Hipparchus likely used the work of Eratosthenes, a famous astronomer who lived in the 3rd century BCE. Eratosthenes is best known for his calculation of the circumference of the Earth, which he estimated to be about 25,000 miles. He also made significant contributions to the study of astronomy, geography, and mathematics.
The Legacy of Hipparchus: Exploring the Cosmic Genius
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