ptolemys-almagest-model-of-the-universe-150-ad
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# Space and Time

Ptolemy's Almagest | Model of the Universe (150 AD)

carl-sagan carl-sagan 1873 years ago
claudius-ptolemy-the-almagest-150-ad
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# TimeMachine

Claudius Ptolemy | The Almagest (150 AD)

greece greece 1873 years ago