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Practice: History of Astronomy

Ptolemy was an astronomer born in Alexandria, Egypt, in the first century AD.

What was his contribution to the field of astronomy?

Ptolemy-72 ppi
  • AHe discovered the law of gravity.
  • BHe discovered a mathematical theory on the movements of the Sun, Moon, and planets.
  • CHe discovered how Earth began.
  • DHe discovered that Earth revolves around the Sun.
  • EHe discovered Mars.

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