Bouvier, Audrey; Wadhwa, Meenakshi (2010), "The age of the Solar System redefined by the oldest Pb–Pb age of a meteoritic inclusion.", Nature Geoscience, 3 (9): 637–641, Bibcode:2010NatGe...3..637B, doi:10.1038/ngeo941 Date based on oldest inclusions found to date in meteorites, thought to be among the first solid material to form in the collapsing solar nebula.
Bouvier, Audrey; Wadhwa, Meenakshi (2010), "The age of the Solar System redefined by the oldest Pb–Pb age of a meteoritic inclusion.", Nature Geoscience, 3 (9): 637–641, Bibcode:2010NatGe...3..637B, doi:10.1038/ngeo941 Date based on oldest inclusions found to date in meteorites, thought to be among the first solid material to form in the collapsing solar nebula.