Results 51 to 60 of about 9,301 (243)

Scattering And Absorption of Light in Planetary Regoliths [PDF]

Journal of Visualized Experiments, 2019
Theoretical, numerical, and experimental methods are presented for multiple scattering of light in macroscopic discrete random media of densely-packed microscopic particles. The theoretical and numerical methods constitute a framework of Radiative Transfer with Reciprocal Transactions (R2T2).
Muinonen, K., Väisänen, T., Martikainen, J., Markkanen, J., Penttilä, A., Gritsevich, M., Peltoniemi, J., Blum, J., Herranen, J., Videen, G., Maconi, G., Helander, P., Salmi, A., Kassamakov, I., Haeggström, E.   +14 more
openaire   +3 more sources

Magnesium phosphate in the Cold Bokkeveld (CM2) carbonaceous chondrite

Meteoritics &Planetary Science, EarlyView.
Abstract Hydrous Mg‐phosphate was first described from astromaterials in particles returned from the C‐type asteroid Ryugu, and has subsequently been found in samples of the B‐type asteroid Bennu and CI1 carbonaceous chondrites. This phase may have been highly significant as a source of bioessential compounds for early Earth.
Martin R. Lee, Tobias Salge, Ian Maclaren   +2 more
wiley   +1 more source

The CM carbonaceous chondrite regolith Diepenveen [PDF]

Meteoritics & Planetary Science, 2019
AbstractA carbonaceous chondrite was recovered immediately after the fall near the village of Diepenveen in the Netherlands on October 27, 1873, but came to light only in 2012. Analysis of sodium and poly‐aromatic hydrocarbon content suggests little contamination from handling.
Aaron S. Burton, Sebastiaan J. De Vet, Sebastiaan J. De Vet, Michael E. Zolensky, Marco Langbroek, Marco Langbroek, Qing-Zhu Yin, Peter Jenniskens, Peter Jenniskens, Mourad Harir, Leo M. Kriegsman, Leo M. Kriegsman, Josh Wimpenny, Josh Wimpenny, Henk Nieuwenhuis, Jason P. Dworkin, Kees C. Welten, Wim van Westrenen, Richard N. Zare, Kunihiko Nishiizumi, Daniel P. Glavin, Matthew E. Sanborn, Qinghao Wu, Philippe Schmitt-Kopplin, Marc W. Caffee, Karen Ziegler, Alexander Ruf, Jacob Kuiper, Matthias M. M. Meier, Matthias M. M. Meier, Akane Yamakawa, Niek De Kort   +31 more
openaire   +6 more sources

Matera: A not so ordinary H5 chondrite breccia with very low density and high porosity

Meteoritics &Planetary Science, EarlyView.
Abstract On the evening of February 14, 2023, at 17:58 UT, a fireball was detected by three cameras of the Italian PRISMA network (FRIPON network). The first samples of the Matera meteorite, collected 3 days after the fall, lay on the balcony of a private home.
Giovanni Pratesi, Tiberio Cuppone, Addi Bischoff, Markus Patzek, Philippe Schmitt‐Kopplin, Matthias Laubenstein, Henner Busemann, Daniela Krietsch, Colin Maden, Richard Greenwood, Robert J. Macke, Xhonatan Shehaj, Dario Barghini, Albino Carbognani, Daniele Gardiol, PRISMA‐Team, Mario Di Martino, Carmelo Falco, Marco Morelli, Sara Bertocco, Tullia Carriero, Matteo Di Carlo, Walter Riva, Giovanna Stirpe, Antonio Valpolicelli, Umberto Repetti, Paolo Trivero, Giovanni B. Valsecchi   +27 more
wiley   +1 more source

The sub‐μm petrography of the observed meteorite fall Winchcombe—A complex array of pristine and altered chondrite components

Meteoritics &Planetary Science, EarlyView.
Abstract Samples of observed meteorite falls provide important constraints on alteration histories of Solar System materials. Due to its rapid collection, terrestrial alteration in the observed Mighei‐type (CM) carbonaceous chondrite fall Winchcombe was minimal.
Johannes Lier, Christian Vollmer, Linus Risthaus, Demie Kepaptsoglou, Quentin M. Ramasse, Aleksander B. Mosberg, Ashley J. King, Charlotte L. Bays, Paul F. Schofield   +8 more
wiley   +1 more source

Rock Location and Property Analysis of Lunar Regolith at Chang’E-4 Landing Site Based on Local Correlation and Semblance Analysis

Remote Sensing, 2020
The Lunar Penetrating Radar (LPR) onboard the Yutu-2 rover from China’s Chang’E-4 (CE-4) mission is used to probe the subsurface structure and the near-surface stratigraphic structure of the lunar regolith on the farside of the Moon.
Hanjie Song, Chao Li, Jinhai Zhang, Xing Wu, Yang Liu, Yongliao Zou   +5 more
doaj   +1 more source

Cosmic ray exposure ages and pre‐atmospheric shielding of Omani meteorites: Implications for 14C and 14C/10Be terrestrial ages of meteorites from hot and cold deserts

Meteoritics &Planetary Science, EarlyView.
Abstract We present isotope concentrations of the light noble gases He and Ne for samples from five well‐documented strewnfields and two individual meteorites from the Omani desert. Cosmogenic (22Ne/21Ne)cos for the strewnfield samples are low, as expected considering the total known masses.
Mohammad Tauseef, Ingo Leya, Beda Hofmann   +2 more
wiley   +1 more source

Three‐dimensional morphological analysis of Chang'e‐5 lunar soil using deep learning‐automated segmentation on computed tomography scans

Computer-Aided Civil and Infrastructure Engineering, EarlyView.
Abstract Grain morphology is a fundamental characteristic of lunar soil that influences its mechanical properties, sintering behavior, and in situ resource utilization. However, traditional two‐dimensional imaging methods are time‐consuming and lack full three‐dimensional (3D) structural information. This study presents an automated deep learning‐based
Siqi Zhou, Yu Jiang, Xinyang Tao, Feng Li, Chi Zhang, Wei Yang, Yangming Gao   +6 more
wiley   +1 more source

Measurement of OH* Generation by Pulverized Minerals Using Electron Spin Resonance Spectroscopy and Implications for the Reactivity of Planetary Regolith

GeoHealth, 2019
Mineral analogs to silicate phases common to planetary regolith, including olivine; the pyroxenes augite and diopside; the plagioclase feldspars labradorite, bytownite, and albite; the Johnson Space Center‐1A lunar regolith simulant; as well as quartz ...
Donald A. Hendrix, Sara T. Port, Joel A. Hurowitz, Martin A. Schoonen   +3 more
doaj   +1 more source

Women in space: A review of known physiological adaptations and health perspectives

Experimental Physiology, EarlyView.
Abstract Exposure to the spaceflight environment causes adaptations in most human physiological systems, many of which are thought to affect women differently from men. Since only 11.5% of astronauts worldwide have been female, these issues are largely understudied.
Millie Hughes‐Fulford, Danielle J. Carroll, Heather C. M. Allaway, Bonnie J. Dunbar, Aenor J. Sawyer   +4 more
wiley   +1 more source