Results 51 to 60 of about 1,926 (144)

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, Volume 43, Issue 7, Page 4475-4514, October 2026.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

The iron oxidation state of Ryugu samples

, 2023
International audienceThe Hayabusa2 mission sampled Ryugu, an asteroid that did not suffer extensive thermal metamorphism, and returned rocks to the Earth with no significant air exposure. It therefore offers a unique opportunity to study the redox state
Zhao, Jiyong, Saiki, Takanao, Nakazawa, Satoru, Viennet, Jean‐christophe, Watanabe, Sei‐ichiro, Beck, Pierre, Nishimura, Masahiro, Miyazaki, Akiko, Noguchi, Takaaki, Alp, Esen, E, Yurimoto, Hisayoshi, Nakamura, Tomoki, Tsuda, Yuichi, Lavina, Barbara, Yabuta, Hikaru, Roskosz, Mathieu, Tanaka, Satoshi, Yada, Toru, Yogata, Kasumi, Tachibana, Shogo, Takahashi, Yoshio, Amano, Kana, Morita, Tomoyo, Okada, Tatsuaki, Terui, Fuyuto, Sakamoto, Kanako, Usui, Tomohiro, Hu, Michael, Y, Abe, Masanao, Okazaki, Ryuji, Yoshikawa, Makoto, Naraoka, Hiroshi, Nakato, Aiko   +32 more
core   +1 more source

Insights into the formation and evolution of extraterrestrial amino acids from the asteroid Ryugu

Nature Communications, 2023
Amino acid concentrations from 2 particles returned from different touchdown sites on the surface of Ryugu are reported. Differences in chemistry suggest different levels of aqueous alteration are recorded at the 2 sampled locations.
Christian Potiszil, Tsutomu Ota, Masahiro Yamanaka, Chie Sakaguchi, Katsura Kobayashi, Ryoji Tanaka, Tak Kunihiro, Hiroshi Kitagawa, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Tomohiro Usui, Sei-ichiro Watanabe, Toru Yada, Kasumi Yogata, Makoto Yoshikawa, Eizo Nakamura   +23 more
doaj   +1 more source

Probing Subsurface Properties With Mission Hardware: Lessons Learned From Artificial Impacts of Mars 2020

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Hardware released during spacecraft entry can generate hypervelocity impacts that provide unique constraints on planetary subsurface properties. During NASA's Perseverance descent, two tungsten cruise ballast mass devices (CBMD) and fragments of the cruise stage formed meter‐scale craters north‐west of Jezero crater, in one of the sinuous ...
A. J. Sokołowska, I. J. Daubar, G. S. Collins, F. Calef, A. Jones   +4 more
wiley   +1 more source

Evidence for the Presence of Thin and Heterogenous Dust Deposits on Ryugu's Boulders From Hayabusa2 MARA and Sample Data

Geophysical Research Letters, 2023
Middle infrared spectral results obtained in‐situ by the Hayabusa2 MARA instrument are generally in‐line with previous results and a new comparison with sample C0137 returned from asteroid (162173) Ryugu, being similar to an aqueously altered CI1 ...
M. Hamm, V. E. Hamilton, C. A. Goodrich
doaj   +1 more source

Microstructural evidence for multiple generations of sulfide precipitation and impact‐induced thermal alteration under acidic conditions on Asteroid Ryugu

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2201-2217, September 2026.
Abstract Here we report on the microstructure and chemistry of sulfide minerals returned from asteroid (162173) Ryugu. We identify a unique sulfide population in particle A0016 composed of violarite (FeNi2S4), pyrite (FeS2), chalcopyrite (CuFeS2), pyrrhotite (Fe1‐xS), and pentlandite ([Fe,Ni]9S8).
M. C. Benner, B. S. Prince, D. L. Schrader, T. J. Zega   +3 more
wiley   +1 more source

Uracil in the carbonaceous asteroid (162173) Ryugu

Nature Communications, 2023
Uracil was identified in the sample returned from the asteroid Ryugu. Having been provided to the early Earth as a component in such asteroidal materials, these molecules might have played a role for prebiotic chemical evolution on the early ...
Yasuhiro Oba, Toshiki Koga, Yoshinori Takano, Nanako O. Ogawa, Naohiko Ohkouchi, Kazunori Sasaki, Hajime Sato, Daniel P. Glavin, Jason P. Dworkin, Hiroshi Naraoka, Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda, Hayabusa2-initial-analysis SOM team   +32 more
doaj   +1 more source

Nature, origin, and phosphorylation potential of the phosphorus/sulfur‐bearing nanoscale multiphasic assemblages in the CM chondrites Murchison and Murray

Meteoritics &Planetary Science, Volume 61, Issue 9, Page 2303-2335, September 2026.
Abstract Carbonaceous chondrites contain phosphorus, whose speciation and thus history remain to be investigated. Phosphorus/sulfur‐bearing assemblages have been reported in carbonaceous CM chondrites, but there is no consensus about their exact compositions and origins.
Valentine Megevand, Sylvain Bernard, Corentin Le Guillou, Roberto Conconi, François Guyot   +4 more
wiley   +1 more source

Geologic History and Crater Morphology of Asteroid (162173) Ryugu [PDF]

, 2021
Crater morphology and surface age of asteroid (162173) Ryugu are characterized using the high-resolution images obtained by the Hayabusa2 spacecraft. Our observations reveal that the abundant boulders on and under the surface of the rubble-pile asteroid ...
Takaki, N., H. Sawada, Yoshioka, Kazuo, M. Yamada, E. Tatsumi, N. Hirata, Hirabayashi, M., Barnouin, Olivier S., Wagner, Roland, Ogawa, Kazunori, R. J. Wagner, K. Yumoto, M. Matsuoka, H. Suzuki, Suzuki, Hidehiko, Kanamaru, Masanori, R. Honda, Y. Yokota, Y. Cho, Honda, R., M. Hirabayashi, Hemmi, Ryodo, K. Ogawa, Hirata, Naru, Yamada, Manabu, Michikami, Tatsuhiro, N. Takaki, Morota, Tomokatsu, Sugita, Seiji, Hirotaka, Sawada, K. Yoshioka, Hayakawa, Masahiro, M. Kanamaru, K. A. Otto, Jaumann, R., R. Hemmi, N. Schmitz, Cho, Yuichiro, Schmitz, Nicole, Matsuoka, Moe, Miyamoto, Hideaki, H. Kikuchi, T. Kouyama, Ernst, Carolyn M., T. Morota, C. Honda, M. Hayakawa, Otto, Katharina A., R. Jaumann, S. Kameda, H. Miyamoto, Kameda, Shingo, O. S. Barnouin, S. Sugita, C. M. Ernst, Kouyama, T., T. Michikami, Tatsumi, Eri, Yokota, Y., Sakatani, Naoya, Honda, Chikatoshi, N. Sakatani, Kikuchi, Hiroshi, Yumoto, Koki   +63 more
core   +1 more source

Ryugu’s observed volatile loss did not arise from impact heating alone

Communications Earth & Environment, 2021
The loss of volatile material from asteroid Ryugu was not caused solely by heating from hypervelocity impacts as previously believed, suggest impact experiments conducted at speeds comparable to those expected in the main asteroid ...
Kosuke Kurosawa, Ryota Moriwaki, Hikaru Yabuta, Ko Ishibashi, Goro Komatsu, Takafumi Matsui   +5 more
doaj   +1 more source