'Planets revolved' presentation slideshows

230 views • 15 slides

Ancient cultures studied the sky and developed calendars based upon the patterns they saw

Ancient cultures studied the sky and developed calendars based upon the patterns they saw. Motion of the sun Motion of the moon Motion of the stars Ancient culture based their calendars on repeating cycles they observed in the sky. What is a day?. What they saw:

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Background of Early Astronomers

Background of Early Astronomers. Looking Back. 1 . Ptolemy (87-150 AD). He thought A . Earth was the center of the solar system (Geocentric view) B . Other planets revolved around Earth, but as they did, they also revolved around a central point. 1 . Ptolemy.

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Early Models of the Universe

Early Models of the Universe. Pythagoreans (500 B.C.). Believed the stars, planets, sun, and moon were attached to crystalline spheres which rotated around the Earth. Geocentric - everything moved around the Earth. Aristotle (350 B.C.).

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World

143 views • 5 slides