Translations of Kepler’s Astrological Writings Part I, Section 2.3. Kepler’s Letter to an Official on Rudolf II and Astrology, 1611

Abstract

Kepler wrote the following letter on Easter Sunday, 3 April 1611, to an unnamed court official. It is of interest because it contains more of Kepler’s views of astrology in addition to his views of how Rudolf thought about astrology. He cautions the official about the undue influence which astrological advice is liable to exert upon the fragile psyche of the Emperor.