Geocentric model: Media
astronomy
Videos
How did Ptolemy explain retrograde motion?
Ptolemy's theory of the solar system.
Video: Encyclopædia Britannica, Inc.
Images
Geocentric system
Ptolemaic diagram of a geocentric system, from the star atlas Harmonia Macrocosmica...
© Photos.com/Getty Images
Tycho Brahe's model of Saturn's motion
Engraving of Tycho Brahe's model of the motion of the planet Saturn, from his Astronomiae...
Library of Congress, Washington, D. C. (85194777)
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