The isotopic composition of meteorites and terrestrial planets holds important clues about
the earliest history of the Solar System and the processes of planet formation. Recent work …

This review examines our current understanding of the possible birth environments of our
Solar System. Because most stars form within groups and clusters, the question becomes …

Abstract We present Atacama Large Millimeter/Sub-Millimeter Array (ALMA) Band 6
observations of a complete sample of protoplanetary disks in the young (∼ 1–3 Myr) Lupus …

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

The Moon is thought to have originated with a magma ocean that produced a plagioclase
flotation crust as solidification proceeded. Ages of anorthositic crust range over at least …

The 182Hf–182W systematics of meteoritic and planetary samples provide firm constraints
on the chronology of the accretion and earliest evolution of asteroids and terrestrial planets …

The age of the Solar System can be defined as the time of formation of the first solid grains in
the nebular disc surrounding the proto-Sun. This age is estimated by dating calcium …

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 …

This review focuses on the rapidly growing field of natural 238U/235U variability, largely
driven by the technical advances in the measurement of U isotope ratios by mass …

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