Jack Sheehan
Graduate Student

Jack’s research focuses on understanding how core–mantle differentiation shapes planetary interiors and surfaces. To do this, he combines high-pressure and high-temperature experiments with numerical modeling to study material properties during planetary differentiation. Jack considers himself both an experimentalist and a modeler.
Jack is a PhD student studying planet formation and mineral physics. He is a member of the Fischer group and is a recipient of the NASA FINESST grant.
Jack received his BS in Geophysics from Rice University in 2022, where he studied the nucleation and detection of laboratory earthquakes. Now, working under Dr. Rebecca Fischer in the Harvard Mineral Physics Lab, Jack investigates the final stages of planet formation.
Outside the lab, he is passionate about simplifying scientific communication, teaching, exploring new places, penguins, and soccer. Jack’s ultimate goals are to advance humanity’s understanding of planet formation and eventually become a principal investigator of a space mission.
Contact Information
20 Oxford Street, Cambridge, MA 02138
jacksheehan@g.harvard.edu