Isotopic variations usually follow mass-dependent fractionation, meaning that the relative
variations in isotopic ratios scale with the difference in mass of the isotopes involved (eg …

In addition to long-lived radioactive nuclei like U and Th isotopes, which have been used to
measure the age of theGalaxy, also radioactive nuclei with half-lives between 0.1 and 100 …

Presented here are the observations and interpretations from a comprehensive analysis of
16 representative particles returned from the C-type asteroid Ryugu by the Hayabusa2 …

Little is known about the origin of the spectral diversity of asteroids and what it says about
conditions in the protoplanetary disk. Here, we show that samples returned from Cb-type …

Geochemical and astronomical evidence demonstrates that planet formation occurred in two
spatially and temporally separated reservoirs. The origin of this dichotomy is unknown. We …

Transient heating events that formed calcium-aluminum–rich inclusions (CAIs) and
chondrules are fundamental processes in the evolution of the solar protoplanetary disk, but …

Nucleosynthetic isotope variability among Solar System objects is often used to probe the
genetic relationship between meteorite groups and the rocky planets (Mercury, Venus, Earth …

Studies of material returned from Cb asteroid Ryugu have revealed considerable
mineralogical and chemical heterogeneity, stemming primarily from brecciation and …

The most abundant components of primitive meteorites (chondrites) are millimeter-sized
glassy spherical chondrules formed by transient melting events in the solar protoplanetary …

The 238 U/235 U isotopic composition of uranium in seawater can provide important insights
into the modern U budget of the oceans. Using the double spike technique and a new data …