Episode 491 - Impacts and the messy history of the early solar system

The early history of our solar system can be deciphered by studying impact craters and meteorites. Craters on the Moon tell us a lot about the violent history of our solar system. Just how many impacts have there been on the Moon? We can study the porosity of the Moon to better estimate just how many impacts have occurred on it. How did Mars get it's atmosphere and from where? A Martian meteorite from deep in the core can tell us a lot about the solar nebula that formed our solar system. Mars formed relatively quickly, before the solar nebula dissipated. Ya Huei Huang, Jason M. Soderblom, David A. Minton, Masatoshi Hirabayashi, H. Jay Melosh. Bombardment history of the Moon constrained by crustal porosity. Nature Geoscience, 2022; DOI: 10.1038/s41561-022-00969-4 Sandrine Péron, Sujoy Mukhopadhyay. Krypton in the Chassigny meteorite shows Mars accreted chondritic volatiles before nebular gases. Science, 2022; DOI: 10.1126/science.abk1175