@article{8768112,
  abstract     = {{Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2 spacecraft. We analyzed seventeen Ryugu samples measuring 1-8 mm. CO2-bearing water inclusions are present within a pyrrhotite crystal, indicating that Ryugu’s parent asteroid formed in the outer Solar System. The samples contain low abundances of materials that formed at high temperatures, such as chondrules and Ca, Al-rich inclusions. The samples are rich in phyllosilicates and carbonates, which formed by aqueous alteration reactions at low temperature, high pH, and water/rock ratios < 1 (by mass). Less altered fragments contain olivine, pyroxene, amorphous silicates, calcite, and phosphide. Numerical simulations, based on the mineralogical and physical properties of the samples, indicate Ryugu’s parent body formed ~ 2 million years after the beginning of Solar System formation.}},
  articleno    = {{eabn8671}},
  author       = {{Nakamura, T. and Matsumoto, M. and Amano, K. and Enokido, Y. and Zolensky, M. E. and Mikouchi, T. and Genda, H. and Tanaka, S. and Zolotov, M. Y. and Kurosawa, K. and Wakita, S. and Hyodo, R. and Nagano, H. and Nakashima, D. and Takahashi, Y. and Fujioka, Y. and Kikuiri, M. and Kagawa, E. and Matsuoka, M. and Brearley, A. J. and Tsuchiyama, A. and Uesugi, M. and Matsuno, J. and Kimura, Y. and Sato, M. and Milliken, R. E. and Tatsumi, E. and Sugita, S. and Hiroi, T. and Kitazato, K. and Brownlee, D. and Joswiak, D. J. and Takahashi, M. and Ninomiya, K. and Takahashi, T. and Osawa, T. and Terada, K. and Brenker, F. E. and Tkalcec, B. J. and Vincze, Laszlo and Brunetto, R. and Aléon-Toppani, A. and Chan, Q. H. S. and Roskosz, M. and Viennet, J.-C. and Beck, P. and Alp, E. E. and Michikami, T. and Nagaashi, Y. and Tsuji, T. and Ino, Y. and Martinez, J. and Han, J. and Dolocan, A. and Bodnar, R. J. and Tanaka, M. and Yoshida, H. and Sugiyama, K. and King, A. J. and Fukushi, K. and Suga, H. and Yamashita, S. and Kawai, T. and Inoue, K. and Nakato, A. and Noguchi, T. and Vilas, F. and Hendrix, A. R. and Jaramillo-Correa, C. and Domingue, D. L. and Dominguez, G. and Gainsforth, Z. and Engrand, C. and Duprat, J. and Russell, S. S. and Bonato, E. and Ma, C. and Kawamoto, T. and Wada, T. and Watanabe, S. and Endo, R. and Enju, S. and Riu, L. and Rubino, S. and Tack, Pieter and Takeshita, S. and Takeichi, Y. and Takeuchi, A. and Takigawa, A. and Takir, D. and Tanigaki, T. and Taniguchi, A. and Tsukamoto, K. and Yagi, T. and Yamada, S. and Yamamoto, K. and Yamashita, Y. and Yasutake, M. and Uesugi, K. and Umegaki, I. and Chiu, I. and Ishizaki, T. and Okumura, S. and Palomba, E. and Pilorget, C. and Potin, S. M. and Alasli, A. and Anada, S. and Araki, Y. and Sakatani, N. and Schultz, C. and Sekizawa, O. and Sitzman, S. D. and Sugiura, K. and Sun, M. and Dartois, E. and De Pauw, Ella and Dionnet, Z. and Djouadi, Z. and Falkenberg, G. and Fujita, R. and Fukuma, T. and Gearba, I. R. and Hagiya, K. and Hu, M. Y. and Kato, T. and Kawamura, T. and Kimura, M. and Kubo, M. K. and Langenhorst, F. and Lantz, C. and Lavina, B. and Lindner, M. and Zhao, J. and Vekemans, Bart and Baklouti, D. and Bazi, Benjamin and Borondics, F. and Nagasawa, S. and Nishiyama, G. and Nitta, K. and Mathurin, J. and Matsumoto, T. and Mitsukawa, I. and Miura, H. and Miyake, A. and Miyake, Y. and Yurimoto, H. and Okazaki, R. and Yabuta, H. and Naraoka, H. and Sakamoto, K. and Tachibana, S. and Connolly, H. C. and Lauretta, D. S. and Yoshitake, M. and Yoshikawa, M. and Yoshikawa, K. and Yoshihara, K. and Yokota, Y. and Yogata, K. and Yano, H. and Yamamoto, Y. and Yamamoto, D. and Yamada, M. and Yamada, T. and Yada, T. and Wada, K. and Usui, T. and Tsukizaki, R. and Terui, F. and Takeuchi, H. and Takei, Y. and Iwamae, A. and Soejima, H. and Shirai, K. and Shimaki, Y. and Senshu, H. and Sawada, H. and Saiki, T. and Ozaki, M. and Ono, G. and Okada, T. and Ogawa, N. and Ogawa, K. and Noguchi, R. and Noda, H. and Nishimura, M. and Namiki, N. and Nakazawa, S. and Morota, T. and Miyazaki, A. and Miura, A. and Mimasu, Y. and Matsumoto, K. and Kumagai, K. and Kouyama, T. and Kikuchi, S. and Kawahara, K. and Kameda, S. and Iwata, T. and Ishihara, Y. and Ishiguro, M. and Ikeda, H. and Hosoda, S. and Honda, R. and Honda, C. and Hitomi, Y. and Hirata, N. and Hirata, N. and Hayashi, T. and Hayakawa, M. and Hatakeda, K. and Furuya, S. and Fukai, R. and Fujii, A. and Cho, Y. and Arakawa, M. and Abe, M. and Watanabe, S. and Tsuda, Y.}},
  issn         = {{0036-8075}},
  journal      = {{SCIENCE}},
  keywords     = {{Multidisciplinary,INTERPLANETARY DUST,CI CHONDRITES,AMORPHOUS SILICATES,MODAL MINERALOGY,OLIVINE,ORGUEIL,CM,PARTICLES,MATRIX,GRAINS}},
  language     = {{eng}},
  number       = {{6634}},
  pages        = {{14}},
  title        = {{Formation and evolution of carbonaceous asteroid Ryugu : direct evidence from returned samples}},
  url          = {{http://doi.org/10.1126/science.abn8671}},
  volume       = {{379}},
  year         = {{2023}},
}

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