The CM chondrites are samples of primitive water-rich asteroids formed during the early
solar system. They record significant interaction between liquid water and silicate rock …

Asteroids and comets are the remnants of the swarm of planetesimals from which the
planets ultimately formed, and they retain records of processes that operated prior to and …

Abstract On September 24, 2023, NASA's OSIRIS‐REx mission dropped a capsule to Earth
containing~ 120 g of pristine carbonaceous regolith from Bennu. We describe the delivery …

Context. The chemical composition of the Sun is a fundamental yardstick in astronomy,
relative to which essentially all cosmic objects are referenced. As such, having accurate …

Nucleosynthetic isotope anomalies are powerful tracers to determine the provenance of
meteorites and their components, and to identify genetic links between these materials. Here …

In Earth and planetary sciences, the chemical composition of chondritic meteorites provides
an essential reference to constrain the composition and differentiation history of planetary …

The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type
(CI) chondrites are distinct from other carbonaceous chondrites, which has led to the …

Stable-isotope variations exist among inner solar system solids, planets, and asteroids, but
their importance is not understood. We report correlated, mass-independent variations of …

CM chondrites are aqueously altered rocks that contain∼ 9wt% H2O+ (ie, indigenous water)
bound in phyllosilicates; also present are clumps of serpentine-tochilinite intergrowths …

Material inherited from different nucleosynthesis sources imparts distinct isotopic signatures
to meteorites and terrestrial planets. These nucleosynthetic isotope anomalies have been …