
The Thomistic Institute My Life Exploring the Solar System and Worlds Beyond – Prof. Jonathan I. Lunine
Feb 2, 2026
Prof. Jonathan I. Lunine, NASA JPL Chief Scientist and planetary scientist, shares his decades-long journey from planetarium wonder to major missions like Voyager, Cassini–Huygens, Juno, and Europa Clipper. He recounts early inspirations, career turns, Titan and Europa discoveries, and the push to explore icy ocean worlds and exoplanet characterization. Short, personal, and full of mission stories.
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Planetarium Sparked A Lifelong Passion
- Jonathan I. Lunine remembers visiting the Hayden Planetarium as a child and being captivated by the Zeiss star projector shows.
- That early planetarium experience kindled his lifelong passion for astronomy and space exploration.
Carl Sagan's Letter Reinforced His Path
- Lunine wrote to Carl Sagan as a teenager asking how to become an astronomer and received an encouraging reply.
- That personal response reinforced his commitment to pursue astronomy despite doubts about the space program's future.
Budgets Shape Scientific Careers
- Lunine highlights how national priorities and budget shifts in the 1960s–70s reshaped individual career choices in space science.
- He connects declining NASA funding to his temporary move toward medicine for economic security.



