On September 27, Mars sailed past its rival star, Antares, in Scorpius. Two days earlier, it had slipped into Ophiuchus the Serpent-bearer. “Ah, there’s Mars in the zodiac’s 13th sign,” I beamed — ...

SCREF copy Purchased with Adopt-a-Book funds. The Greco-Roman mathematician Claudius Ptolemy is one of the most significant figures in the history of science. He is remembered today for his astronomy, ...