| Session Details | |
| Section | PS - Planetary Sciences |
| Session Title | From Dust to Planets: the First Hundred Million Years of the Solar System |
| Main Convener | Mr. Ramon Brasser (Earth Life Science Institute, Japan) |
| Co-convener(s) | Dr. Stephen Mojzsis (University of Colorado Boulder, United States) Dr. Meenakshi Wadhwa (Arizona State University, United States) Dr. Liping Qin (University of Science and Technology of China, China) |
| Session Description | For a long time the formation and early evolution of the Solar System has been an active topic of debate and investigation. Only recently has substantial progress been made that begins to put together a consistent and coherent picture its earliest epoch: the first 100 million years. This time span witnessed the emergence of planetesimals from dust and gas followed by the assembly of protoplanets from planetesimals and eventually the coalescence into the embryonic terrestrial planets with approximately their present-day masses and radii. These young terrestrial planets were continued to be bombarded by leftover material in the form of the late veneer and late accretion, including the Moon-forming event on the Earth and the collosal impact on Mars that created its satellites and hemispheric dichotomy. Much remains unclear of the nature of this primordial evolution. Questions arise about the timing of chondrule and chondrite formation, the amount of material mixing in the disc, the final bulk composition of the terrestrial planets, the possible migration of the giant planets, and much more. It makes sense at this time to synthesize what we know, highlight key points of agreement and contention, and to provide recommendations for progress. This session centres around the evolution of the Solar System for the first hundred million years. We aim to integrate views and data from cosmochemistry, geochronology, thermal modelling and dynamics to formulate a coherent timeline of the earliest epoch of our planetary system. |