Prof. Jonathan I. Lunine presents his life as a planetary scientist and Catholic convert as a lived example of the harmony between faith and science, then highlights two priest‑scientists—Georges Lemaître and Gregor Mendel—whose foundational work on the Big Bang and genetics shows that Catholic belief has stood at the center of modern scientific revolutions.

This lecture was given on February 20th, 2026, at Duke University.

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About the Speakers:

Jonathan Lunine is the Chief Scientist at NASA’s Jet Propulsion Laboratory and Professor of Planetary Science at Caltech in Pasadena, California. Beforehand, he was the David C. Duncan Professor in the Physical Sciences and Chair of the Department of Astronomy at Cornell University. Lunine is interested in how planets form and evolve, what processes maintain and establish habitability, and what kinds of exotic environments (methane lakes, etc.) might host a kind of chemistry sophisticated enough to be called "life". He pursues these interests through theoretical modeling and participation in spacecraft missions. He is co-investigator on the Juno mission now in orbit at Jupiter, using data from several instruments on the spacecraft, and on the MISE and gravity science teams for the Europa Clipper mission. He was on the Science Working Group for the James Webb Space Telescope, focusing on characterization of extrasolar planets and Kuiper Belt objects. Lunine has contributed to concept studies for a wide range of planetary and exoplanetary missions. Lunine is a member of the National Academy of Sciences and has participated in or chaired a number of advisory and strategic planning committees for the Academy and for NASA.

Keywords: Big Bang, Catholic Scientists Society, Conversion Story, Darwin Mendel Synthesis, Georges Lemaitre, Gregor Mendel Augustinian Monk, Myth of War Between Science And Religion, Planetary Science, Thomistic Perspective On Creation, Vatican Observatory

Catholic Scientists – Prof. Jonathan I. Lunine

The Thomistic Institute