The astronomy of primum mobile: Placidean directions under the pole
Since the Antiquity astrology (and prediction) was based on astronomical tables generally divided into three different parts collected together: tables of primum mobile, tables of planetary positions, eclipses; at the beginning of the Renaissance tables of primum mobile were separated from the rest: the most famous of all Regiomontanus’ ones, which the author called “Tables [...]










About Cardano’s seven segments (aphorisms): a review
The snow falls in Rome
Dorotheus on ships: the Concordia departure
September 13, 2009
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