Planetary Systems (United States)

Afghanite: A New Silicate‐Matrix Reference Material for In Situ Halogen and Sulfur Microanalysis

Sulfur (S) and the halogens (F, Cl, Br, I) play key roles in geochemical processes that govern volatile cycling, redox evolution, phase reactions and ore formation in the Earth's crust and mantle. Quantifying these elements in situ requires well‐characterised reference materials...

The Complete Conquest of the Seven Millennium Problems and Their Corresponding Fields of Technological Knowledge/千禧年七大題的全攻克以及再對應的科技知識領域

Description — English Abstract This work presents an interdisciplinary framework connecting mathematical geometry, physical phenomena, and tangible engineering applications. It re-examines the seven Millennium Prize Problems through recurring structural concepts involving space,...

The Complete Conquest of the Seven Millennium Problems and Their Corresponding Fields of Technological Knowledge/千禧年七大題的全攻克以及再對應的科技知識領域

Description — English Abstract This work presents an interdisciplinary framework connecting mathematical geometry, physical phenomena, and tangible engineering applications. It re-examines the seven Millennium Prize Problems through recurring structural concepts involving space,...

The parent bodies of Ryugu and Ivuna formed before those of other carbonaceous chondrites

Most carbonaceous chondrite (CC) meteorites contain abundant chondrules, millimeter-scale spherical inclusions of previously molten material. Ivuna-type carbonaceous chondrites (CIs) do not contain chondrules, nor do samples of the carbonaceous asteroid Ryugu. CIs and Ryugu share...

Spatiotemporal Deep Learning for Continuous Illumination Mapping and Sun-Synchronous Path Planning in Lunar Polar Exploration Under Chang’E-7 Mission Constraints

The lunar south polar region’s extreme illumination conditions impose strict energy constraints for solar-powered rover operations. Traditional Sun-synchronous path planning relies on dynamic time-dependent illumination evaluation, leading to high computational costs. We present...

Locating Moonquakes With Single‐Station Seismology

Abstract Renewed international interest in lunar seismometer deployments requires robust single‐station location approach for the highly scattering Moon's crust. We present an event‐location strategy using major lunar event types recorded by the Apollo seismic network. Frequency‐...

Rb-Sr and U-Pb geochronology of neoblasts and porphyroclasts constrain movements along reactivated segments of the Outer Hebrides Fault Zone, NW Scotland

The crustal-scale Outer Hebrides Fault Zone (OHFZ) (NW Scotland) was initiated as a Stenian-Tonian (1040-950 Ma) ductile thrust, as determined by published U-Pb dating of syn-kinematic apatite. Thrust-related mylonites were then reactivated to form phyllonite belts during success...