Where do you turn for answers to pressing questions? You might glance at a weather forecast, the latest political polls, a book of theology or philosophy—or flip a coin. People living in the early modern period likewise had their ways of seeking solutions to life’s puzzles and finding guidance in the face of uncertainty. Besides prayer, a common practice was to turn to astrology and read the heavens for their influences upon human agents. Indeed, it is hard to overstate how pervasive astrological belief was during the sixteenth and seventeenth centuries. At once esoteric and yet imminently practical, Renaissance astrology touched upon all sectors of early modern lives.