Results 61 to 70 of about 2,275 (247)

Discovery of a Lunar Cold Spot at Apollo 16's South Ray Crater

Geophysical Research Letters, Volume 52, Issue 18, 28 September 2025.
Abstract Lunar cold spots are extensive, ray‐like regions of reduced nighttime temperature surrounding young impact craters. Using improved Diviner temperature maps, we identify a faint cold spot surrounding South Ray crater at the Apollo 16 landing site.
Tyler M. Powell, Jean‐Pierre Williams, Benjamin T. Greenhagen, Paul O. Hayne, Catherine M. Elder, David A. Paige   +5 more
wiley   +1 more source

A Goniometric System for Photometric and Polarization Measurements of Planetary Regolith Analogs

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract The Planetary Surface Texture Laboratory at the Johns Hopkins University Applied Physics Laboratory is a facility for the study of the photometric and polarization behavior of regolith analogs using an ∼1.5‐m‐radius arc goniometer system. This system characterizes the photometric and polarization response of granular materials (planetary ...
Lizeth O. Magaña, David T. Blewett, Anna C. Martin, Goran Basic, Jordan Wiker, Adam Sniderman, Janine Newhook, Parvathy Prem, Brett W. Denevi, Hiroyuki Sato   +9 more
wiley   +1 more source

Simplified Particle Models and Properties Analysis Designed for DEM Lunar Soil Simulants

Aerospace
The discrete element method (DEM) is one of the most popular methods for simulating lunar soil simulants due to the lack of real lunar soil. To reduce the computational consumption and difficulty because of complex particle models, simplified particle ...
Junhao Liu, Qian Li, Xiuli Xiong, Lanlan Xie   +3 more
doaj   +1 more source

Soil experiment [PDF]

An experimental procedure was devised to investigate the effects of the lunar environment on the physical properties of simulated lunar soil. The test equipment and materials used consisted of a vacuum chamber, direct shear tester, static penetrometer ...
Butler, Todd, Cline, Charles, Hutcheson, Linton, Scruggs, Steve, Smith, Mike, Zakhia, Nadim   +5 more
core   +1 more source

Collection and In Situ Analyses of Regolith Samples by the Mars 2020 Rover: Implications for Their Formation and Alteration History

Journal of Geophysical Research: Planets, Volume 130, Issue 2, February 2025.
Abstract The Perseverance rover has sampled mm‐size lithic fragments containing olivine likely from at least two source regions from the surface of an inactive megaripple surface, and fine‐grained material from the surface and to a depth of ∼4–6 cm. Some of the mm‐size grains lack a coherent diffraction pattern measured by PIXL, consistent with the ...
E. M. Hausrath, R. Sullivan, Y. Goreva, M. P. Zorzano, A. Vaughan, A. Cousin, S. Siljeström, S. Sharma, A. O. Shumway, T. Kizovski, S. J. VanBommel, M. Tice, A. Knight, G. Martinez, A. Vicente‐Retortillo, L. Mandon, C. T. Adcock, J. M. Madariaga, I. Población, J. R. Johnson, J. Lasue, O. Gasnault, N. Randazzo, E. L. Cardarelli, R. Kronyak, A. Bechtold, G. Paar, A. Udry, O. Forni, C. C. Bedford, N. A. Carman, J. F. Bell III, K. Benison, T. Bosak, A. Brown, A. Broz, F. Calef, B. C. Clark, E. Cloutis, A. D. Czaja, T. Fornaro, T. Fouchet, M. Golombek, F. Gómez, C. D. K. Herd, K. Herkenhoff, R. S. Jakubek, L. Jandura, J. Martinez‐Frias, L. E. Mayhew, P.‐Y. Meslin, C. E. Newman, J. I. Núñez, F. Poulet, C. Royer, P. Russell, M. A. Sephton, S. K. Sharma, D. Shuster, J. I. Simon, I. Tirona, R. C. Wiens, B. P. Weiss, A. J. Williams, K. Williford, Z. U. Wolf, the Regolith Working Group   +66 more
wiley   +1 more source

ISRU Soil Mechanics Vacuum Facility: Soil Bin Preparation and Simulant Strength Characterization [PDF]

, 2012
Testing in relevant environments is key to exploration mission hardware development. This is true on both the component level (in early development) and system level (in late development stages).
Kleinhenz, Julie, Wilkinson, Allen
core   +1 more source

Near Room Temperature Production of Segregated Network Composites of Carbon Nanotubes and Regolith as Multifunctional, Extra‐Terrestrial Building Materials

Small, Volume 20, Issue 38, September 19, 2024.
Future space missions will need to fabricate building materials on the moon or Mars from local soil or regolith. Here it is shown that carbon nanotubes can be used as a binder to convert fine sand as well as lunar and Martian regolith simulants into solid “bricks” with excellent mechanical properties.
James Garcia, Eoin Caffrey, Luke Doolan, Dominik V. Horvath, Tian Carey, Cian Gabbett, Jonathan N. Coleman   +6 more
wiley   +1 more source

Research on the Compactness of Lunar Soil Simulant Based on Static Cone Penetration Test

Applied Sciences
The shear strength and bearing characteristics of lunar soil have a strong connection with its compactness. The compactness varies significantly with depth and has an important effect on engineering activities on the lunar surface.
Yuxin Zhang, Hui Gao, Xiaohong Fang, Shuting Xing, Long Xiao, Longchen Duan   +5 more
doaj   +1 more source

Glass fiber processing for the Moon/Mars program: Center director's discretionary fund final report [PDF]

Glass fiber has been produced from two lunar soil simulants. These two materials simulate lunar mare soil and lunar highland soil compositions, respectively.
Curreri, P., Ethridge, E., Tucker, D. S.
core   +1 more source

Calibration of discrete element method simulation parameters for lunar rover using simulated lunar soil

Journal of Physics: Conference Series
Abstract To ensure the accuracy and scientific validity of simulation results in discrete element simulation of simulated lunar soil and sieve wheels for lunar surface probes, a method for calibrating the simulation parameters of an analog lunar soil simulation using a box-Behnken experimental design is proposed.
Liangliang Zhao, Hua Zhang, Jia Ma, Yupei Du, Zhenyu Hu, Rui Zhang, Guifen Zhou   +6 more
openaire   +1 more source