Isotopic imprints of late molecular cloud infall in the outer Solar System

Key Points

• The research aims to investigate the isotopic composition of late material infall to the outer Solar System and how it affects our understanding of Earth’s building blocks.
• Analyzed anomalous carbonaceous chondrites for isotopic signatures.
• Identified the formation locations of Bennu- and Ryugu-like bodies at the water ice line.
• Examined the implications for the history of Earth’s volatiles.
• Found that anomalous carbonaceous chondrites indicate late infall of distinct materials to the outer disk.
• Proposed that Bennu- and Ryugu-like bodies formed specifically at the migrating water ice line.
• Revised the understanding of Earth's volatile-rich building blocks based on these findings.