Rhythms of the Cosmos – A Guest Post by Dr Andrew Fletcher

Ptolemy

The apparent orbital paths of the Sun, Venus and Mercury around the Earth, according to the system of Ptolemy (2nd Century AD), in an illustration from the 1st Edition of the Encyclopedia Britannica, 1771.

The apparent orbital paths of the Sun, Venus and Mercury around the Earth, according to the system of Ptolemy (2nd Century AD), in an illustration from the 1st Edition of the Encyclopedia Britannica, 1771.

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