Results 81 to 90 of about 47,493 (267)

Determining the feasible conditions for processing lunar regolith simulant via laser powder bed fusion

Additive Manufacturing, 2020
Additive manufacturing shows an intrinsic compatibility with building in extra-terrestrial colonization. The use of raw materials found in situ can drastically reduce the complexity of the material supply chain.
L. Caprio, A. Demir, B. Previtali, B. Colosimo   +3 more
semanticscholar   +1 more source

Initial study of regolith exposure ages and burial conditions on Ryugu: Cosmogenic nuclides score in two touchdowns

Meteoritics &Planetary Science, EarlyView.
Abstract Surface processes on the asteroid Ryugu have been investigated using cosmic‐ray‐produced radionuclides, 10Be, 26Al, and 36Cl, and stable noble gases, on eight samples returned by the Hayabusa2 spacecraft. The 10Be and 26Al along with 21Ne measurements indicate that the two Chamber A samples A0105 collected during the first touchdown (TD) were ...
Kunihiko Nishiizumi, Keisuke Nagao, Marc W. Caffee, Ryuji Okazaki, Jozef Masarik, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Kasumi Yogata, Toru Yada, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda, Masanao Abe, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Hirotaka Sawada, Satoshi Tanaka, Tomohiro Usui, Koji Wada, Hajime Yano, Makoto Yoshikawa, Hayabusa2 Initial Analysis Volatile Team   +30 more
wiley   +1 more source

Automated Additive Construction (AAC) for Earth and Space Using In-situ Resources [PDF]

, 2016
Using Automated Additive Construction (AAC), low-fidelity large-scale compressive structures can be produced out of a wide variety of materials found in the environment.
Ali, Hisham, Andersen, Christian, Burgoyne, Hayden, Chambers, Wesley, Clinton, Raymond, De Kestellier, Xavier, Ebelt, Keye, Gerner, Shai, Hofmann, Douglas, Hogstrom, Kristina, Howe, Scott, Ilves, Erika, Jerves, Alex, Keenan, Ryan, Keravala, Jim, Khoshnevis, Behrokh, Kochmann, Dennis, Lim, Sungwoo, Metzger, Philip, Meza, Lucas, Mueller, Robert P., Nakamura, Takashi, Nelson, Andrew, Partridge, Harry, Pettit, Donald, Pyle, Rod, Reiners, Eric, Shapiro, Andrew, Singer, Russell, Tan, Wei-Lin, Vazquez, Noel, Wilcox, Brian, Zelhofer, Alex   +32 more
core  

The Sands of Phobos: The Martian moon's eccentric orbit refreshes its surface

, 2018
The surface of the Martian moon Phobos exhibits two distinct geologic units, known as the red and blue units. The provenance of these regions is uncertain yet crucial to understanding the origin of the Martian moon and its interaction with the space ...
Ballouz, Ronald-Louis, Baresi, Nicola, Crites, Sarah T., Fujimoto, Masaki, Kawakatsu, Yasuhiro   +4 more
core   +1 more source

The water cycle and regolith-atmosphere interaction at Gale crater, Mars [PDF]

, 2017
We perform mesoscale simulations of the water cycle in a region around Gale crater, including the diffusion of water vapour in and out of the regolith, and compare our results with measurements from the REMS instrument on board the Curiosity rover ...
Aharonson, Aymeric Spiga, Boynton, Böttger, Böttger, Chamberlain, Clancy, Fanale, Fanale, Farmer, Feldman, Forget, Glenar, Guzewich, Gómez-Elvira, Gómez-Elvira, Haberle, Harri, Harri, Jakosky, Jakosky, Lewis, Lewis, Liam J. Steele, Madeleine, Maltagliati, Maltagliati, Martín-Torres, Martínez, Martínez, Matthew R. Balme, Maurice, McCleese, Mellon, Mellon, Mellon, Mellon, Michaels, Montabone, Montmessin, Moores, Pankine, Pla-Garcia, Rafkin, Rivera-Valentin, Savijärvi, Savijärvi, Schofield, Schorghofer, Skamarock, Smith, Smith, Smith, Smoluchowski, Spiga, Steele, Steele, Steele, Stephen R. Lewis, Titov, Tokano, Tschimmel, Tyler, Tyler, Wilson, Zent, Zent, Zent, Zent   +68 more
core   +3 more sources

Petrography and mineral chemistry of Northeast Africa 053—A remnant of Martian crystal mush

Meteoritics &Planetary Science, EarlyView.
Abstract In Earth's igneous systems, crystal mushes, crystal‐rich frameworks permeated by silicate melt, represent a common and fundamental stage in the evolution of magma bodies. However, whether crystal mushes occur within Martian igneous systems and play a comparable role is unknown. Here, we present a comprehensive petrography and mineral chemistry
Xhonatan Shehaj, Eleonora Ammannito, Giovanni Pratesi   +2 more
wiley   +1 more source

Parametric review of existing regolith excavation techniques for lunar In Situ Resource Utilisation (ISRU) and recommendations for future excavation experiments

, 2020
A high-level overview of current research in the area of lunar regolith excavation and handling for In Situ Resource Utilisation (ISRU) is presented. Thirteen processes are grouped into discrete and continuous excavators.
G. Just, Katharine L. Smith, K. Joy, M. Roy   +3 more
semanticscholar   +1 more source

Sintering of 3D printable simulated lunar regolith magnesium oxychloride cements

, 2021
This study investigates the formulation, processing, hardened state properties, and additive manufacturing of sintered 3D-printable simulated lunar regolith magnesium oxychloride (MOC) cements.
Jorge Osio-Norgaard, Austin C. Hayes, G. Whiting   +2 more
semanticscholar   +1 more source

Model Calculations for Cosmogenic Nuclides in Meteorites and the Lunar Surface. 1. Long‐lived Radionuclides

Meteoritics &Planetary Science, EarlyView.
Abstract Production rates for the cosmogenic radionuclides 10Be, 14C, 26Al, 36Cl, 41Ca, 53Mn, and 60Fe in a large variety of meteorites, that is, ordinary chondrites (H, L, LL), carbonaceous chondrites, HED meteorites, ureilites, Martian meteorites, and iron meteorites and in the uppermost ~2 m of the lunar surface are modeled.
Ingo Leya
wiley   +1 more source

Non‐innocent solvents in meteorite extractions: Evidence for artifact formation

Meteoritics &Planetary Science, EarlyView.
Abstract Solvent extraction is a cornerstone of meteoritic organic and inorganic chemistry, yet the assumption that common solvents act as chemically inert media is becoming increasingly untenable. This study reports that low‐molecular‐weight alcohols, particularly methanol and ethanol, are “non‐innocent” solvents when used to extract soluble sulfur ...
N. Randazzo, R. W. Hilts, R. M. Whittal, B. Reiz, V. Olan‐Rubio, C. D. K. Herd, I. H. Krouse   +6 more
wiley   +1 more source