The Greek mathematician Ptolemy devised a
A) sundial.
B) geocentric model for the solar system.
C) heliocentric model for the solar system.
D) method to measure Earth's radius.

Name: The Greek mathematician Ptolemy devised a A) sundial. B) geocentric model for the solar system. C) heliocentric model for the solar system. D) method to measure Earth's radius.
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Ptolemy is famous for his geocentric model of the universe, where the Earth is at the center and all other celestial bodies revolve around it.

The Greek Mathematician Ptolemy Devised a