Fr. Ambrose Little’s lecture explains why medieval philosophers studied astrology as part of natural science, showing how its connection to astronomy, cosmology, and causal mechanisms shaped intellectual inquiry, yet warns that modern astrology lacks scientific legitimacy and poses spiritual risks.

This lecture was given on September 19th, 2025, at University of Michigan

For more information on upcoming events, visit us at thomisticinstitute.org/upcoming-events.

About the Speakers:

Fr. Ambrose Little is the director of the Thomistic Institute. He is originally from Connecticut and entered the Dominican Order in 2007 and was ordained a priest in 2013. Before entering the Dominican Order, he graduated from The Catholic University of America with a BA in philosophy. After ordination, he completed a Licentiate in Philosophy at The Catholic University of America and then taught for two years at Providence College. After completing his Ph.D. in philosophy at the University of Virginia in the summer of 2021, he started teaching at the Pontifical Faculty of the Immaculate Conception. He specializes in the philosophies of Aristotle and St. Thomas Aquinas, with an emphasis on their study of nature and the soul. He also studies topics at the intersection between philosophy and science.

Keywords: Albert The Great, Aristotelian Cosmology, Augustine’s Critique, Causal Mechanisms, Geocentrism, Horoscopes, Medieval Natural Philosophy, Natural Science, Spiritual Risk, Subalternation Of Sciences

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