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Date(s) - 4 décembre 2025
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4 décembre 2025, 13h15 amphithéâtre du CRPG | Spitzer Fridolin (Max-Planck-Gesellschaft)
The onset of planet formation inferred from isotope anomalies in meteorites
How and when do planetary systems emerge, and what can our own Solar System tell us about this process? By combining astronomical observations with high-precision isotope cosmochemistry, we can reconstruct the earliest stages of planet formation. Meteorites—time capsules from different generations of planetesimals—preserve spatial and temporal records of the evolving protoplanetary disk. These first gravitationally bound bodies, ranging from tens to hundreds of kilometers in size, formed within a dynamic and structured disk whose properties governed where and how planets could grow. In this talk, I will explore how isotope anomalies in meteorites constrain the timing, location, and mechanisms of planetesimal formation, and what this reveals about the birth environment of the terrestrial planets.