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  • Ptolemy's Planets: Unveiling His Ancient Solar System Knowledge
    Ptolemy knew of seven planets:

    * Mercury

    * Venus

    * Mars

    * Jupiter

    * Saturn

    * The Sun

    * The Moon

    It's important to note that Ptolemy's model placed the Earth at the center of the universe, with the other celestial bodies revolving around it. This geocentric model was the prevailing scientific view for over 1,400 years before being replaced by the heliocentric model proposed by Nicolaus Copernicus.

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