number.
Column A
1. Hipparchus
2. Aristarchus
Column B
A. He proposed a system of fixed spheres. He
believed that the sun, the moon, the five
known planets and the stars were
attached to these spheres.
B. He was able to explain what causes the
phases of the moon. According to him, the
moon shone only by reflected sunlight.
3. Eratosthenes
4. Anaxagoras
5. Eudoxus
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