
Solar system formation: Irradiation model challenges the CO photodissociation hypothesis
A new study proposes that energetic particle irradiation, rather than gas mixing, drove the depletion of oxygen-16 in terrestrial bodies. By damaging dust grains, cosmic rays may have allowed rapid isotope exchange with water ice. This mechanism offers a solution to the chronological mismatch in mineral formation.
By Dominguez, Lucas, Tafla, Liu, McKeegan

