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http://dx.doi.org/10.1038/d41586-023-02766-4 | DOI Listing |
Space Sci Rev
September 2025
Johns Hopkins University Applied Physics Laboratory, Laurel, MD USA.
A Gamma-Ray and Neutron Spectrometer (GRNS) instrument has been developed as part of the science payload for NASA's Discovery Program Psyche mission to the M-class asteroid (16) Psyche. The GRNS instrument is designed to measure the elemental composition of Psyche with the goal to understand the origin of this mysterious, potentially metal-rich planetary body. The GRNS will measure the near-surface abundances for the elements Ni, Fe, Si, K, S, Al, and Ca, as well as the spatial distribution of Psyche's metal-to-silicate fraction (or metal fraction).
View Article and Find Full Text PDFPhys Chem Chem Phys
August 2025
W. M. Keck Research Laboratory in Astrochemistry, University of Hawaii at Manoa, Honolulu, HI 96822, USA.
The first experimental formation of thiocarbonic acid (HCS) is presented in this work from low-temperature interstellar ice analogs composed of hydrogen sulfide (HS) and carbon disulfide (CS) exposed to electron irradiation simulating the impact of galactic cosmic rays (GCRs) on interstellar ices. The recent attention brought to sulfur-bearing molecules, as well as the recent detection of carbonic acid (HCO) in the interstellar medium (ISM), invites the study of the interstellar detection of the sulfur counterpart, thiocarbonic acid. However, the interstellar formation pathways of thiocarbonic acid have remained elusive.
View Article and Find Full Text PDFToxics
July 2025
Department of Geology, Mansoura University, Mansoura 35516, Egypt.
Between approximately 725 and 518 Ma, a suite of specialized felsic plutons and granitic stocks were emplaced across the Arabian Shield, many of which are now recognized as highly mineralized prospects enriched in rare earth elements (REEs), rare metals, and radioactive elements bearing mineralizations. The current investigation focused on the radiological and geochemical characterization of naturally occurring radionuclides, specifically U, Ra, Th, and K, within three strategically selected granitic prospects, namely, J. Tawlah albite granite (TW), J.
View Article and Find Full Text PDFACS Meas Sci Au
August 2025
Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39759, United States.
Dynamic systems, defined by their continuous temporal evolution, are central to advancements in chemistry, biology, and materials science. Optical techniques that leverage light absorption, scattering, and emission are essential for characterizing structural and property changes in these systems. However, conventional optical toolssuch as UV-vis spectroscopy, fluorescence, and scattering techniquesprovide fragmented or incomplete insights, making it challenging to comprehensively understand dynamic processes and ensure reliable data interpretation.
View Article and Find Full Text PDFACS Earth Space Chem
August 2025
Centre de Recherche sur les Ions, les Matériaux et la Photonique Normandie University, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
Studying the physicochemical properties of ice in astronomical environments is crucial to understanding the chemical processes involved in cosmic events such as comet and planet formation. The physical characteristics and chemical evolution on the surfaces of cosmic objects such as comets or interstellar grains offer key insights into these processes. This study focuses on α-pinene, a carbon- and hydrogen-rich molecule, which serves as a model for investigating radical-driven synthesis of more complex molecules under space-like conditions.
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