・I. Ikeda, R. Futami, I. Yoda, Y. Kebukawa, K. Kobayashi. Stability and transformation of interstellar amino acid precursors under simulated meteorite parent body conditions. International Journal of Astrobiology, 25, e6 (2026) doi: 10.1017/S1473550426100299

・C. A. Goodrich, V. E. Hamilton, M. E. Zolensky, N. Kita, I. Kohl, L. Tafla, R. J. Macke, T. Hiroi, Y. Kebukawa, W. Buckley, J. B. Setera, J. I. Simon, A. H. Treiman, J. S. Gorce, H. C. Connolly, Jr., A. M. Fioretti, E. Young, Q.-Z. Yin, A. M. Miller, J. Martinez, G. Siron, W. O. Nachlas, T. Tominaga, M. Jercinovic, P. Jenniskens, M. H. Shaddad. Petrogenesis and Provenance of Unique Amphibole-Bearing Carbonaceous Chondrite Almahata Sitta 202: Further Evidence for a Ceres-Sized, Water-Rich Parent Body. Geochimica et Cosmochimica Acta, accepted. doi: 10.1016/j.gca.2026.02.019

・T. Fujii, S. Abe, N. Hirakawa, K. Kobayashi, Y. Kebukawa*. Influence of minerals on aldose formation during hydrothermal processes in meteorite parent bodies. Progress in Earth and Planetary Science, 13, 6 (2026) doi: 10.1186/s40645-025-00793-5

・T. Mieno, S. Nakamura, S. Sekiguchi, S. Hasegawa, H. Shibata, Y. Kebukawa, K. Kobayashi. Impact formation of amino acids in nitrogen gas using a light gas gun simulating the impact reactions of asteroids on planets/satellites with a gas atmosphere. Discover Life, 55, 29 (2025) doi: 10.1007/s11084-025-09709-1

・S. Abe, N. Hirakawa, K. Toyoshima, I. Yoda, K. Kobayashi, Y. Kebukawa*. Catalytic Effects on Aldose Formation by γ-ray-Induced Formose-Type Reactions in Meteorite Parent Bodies. ACS Earth and Space Chemistry, 9, 2115-2126 (2025) doi: 10.1021/acsearthspacechem.5c00119

・Q. H. S. Chan, H. Nomura, Y. Kebukawa, I. Sakon and K. Taniguchi. Organic matter - From birth in the interstellar medium and beyond to incorporation and processing in planetary building blocks. Treatise on Geochemistry (Third edition), eds: Ariel Anbar & Dominique Weis, Elsevier, pp. 147-202 (2025) doi:10.1016/B978-0-323-99762-1.00145-5

・T. Noguchi, A. Miyake, H. Yabuta, Y. Kebukawa, H. Suga, M. Tabata, K. Okudaira, A. Yamagishi and H. Yano. Mineralogy of terminal grains recovered from the Tanpopo capture panel onboard the International Space Station. Meteoritics & Planetary Science, 60, 916-927 (2025) doi: 10.1111/maps.14327

・N. Imai, Y. Kebukawa*, K. Kobayashi and I. Yoda. Formation of amino acid precursors in early aqueous alteration in small bodies: Synergetic effects of gamma rays and hydrothermal processing. Geochemical Journal, 58, 304-315 (2024) doi: 10.2343/geochemj.GJ24025

・G. D. Cody, C. M. O’D. Alexander, D. I. Foustoukos, Y. Kebukawa, Y. Wang. On the origin and evolution of deuterium enrichment in type 1 and 2 chondritic organic solids. Geochimica et Cosmochimica Acta, 386, 139-156 (2024) doi: 40.1016/j.gca.2024.09.023

・M. Kobayashi, J. Takahashi, H. Ota, K. Matsuo, Mohamed I. A. Ibrahim, T. Minato, G. Fujimori, M. Katoh, K. Kobayashi, Y. Kebukawa and H. Nakamura. Emergence of Optical Activity and Surface Morphology Changes in Racemic Amino Acid Films Under Circularly Polarized Lyman-α Light Irradiation. Chirality, 36, e70004 (2024) doi: 10.1002/chir.70004

・M. Zheng, Y. Kebukawa*, Y. Hayashi and K. Kobayashi. Kinetic analysis of dehydration/dehydroxylation from carbonaceous chondrites by in situ heating experiments under an infrared microscope. Meteoritics & Planetary Science, 59, 2981-2997 (2024) doi: 10.1111/maps.14259

・B. De Gregorio, G. D. Cody, R. M. Stroud, A. L. David Kilcoyne, S. Sandford, C. Le Guillou, L. R. Nittler, J. Barosch, H. Yabuta, Z. Martins, Y. Kebukawa, T. Okumura, M. Hashiguchi, S. Yamashita, Y. Takeichi, Y. Takahashi, D. Wakabayashi, C. Engrand, L. Bejach, L. Bonal, E. Quirico, L. Remusat, J. Duprat, M. Verdier-Paoletti, S. Mostefaoui, M. Komatsu, J. Mathurin, A. Dazzi, A. Deniset-Besseau, E. Dartois, Y. Tamenori, H. Suga, G. Montagnac, K. Kamide, M. Shigenaka, M. Matsumoto, Y. Enokido, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, T. Usui, M. Abe, T. Okada, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, H. Yurimoto, T. Nakamura, T. Noguchi, R. Okazaki, H. Naraoka, K. Sakamoto, S. Tachibana, S.-i. Watanabe and Y. Tsuda. Variations of organic functional chemistry in carbonaceous matter from the asteroid 162173 Ryugu. Nature Communications, 15, 7488 (2024) doi: 10.1038/s41467-024-51731-w

・S. Abe, I. Yoda, K. Kobayashi, Y. Kebukawa*. Gamma-ray-induced synthesis of sugars in meteorite parent bodies. ACS Earth and Space Chemistry, 8, 1737–1744 (2024) doi: 10.1021/acsearthspacechem.4c00099

・H. G. Changela, Y. Kebukawa, L. Petera, M. Ferus, E. Chatzitheodoridis, L. Nejdl, R. Nebel, V. Protiva, P. Krepelka, J. Moravcova, R. Holbova, Z. Hlavenkova, T. Samoril, J. C. Bridges, S. Yamashita, Y. Takahashi, T. Yada, A. Nakato, K. Sobotkova, H. Tesarova and D. Zapotok. The evolution of organic material on Asteroid 162173 Ryugu and its delivery to Earth. Nature Communications, 15, 6165 (2024) doi: 10.1038/s41467-024-50004-w

・M. Komatsu, H. Yabuta, Y. Kebukawa, L. Bonal, E. Quirico, T. J. Fagan, G. D. Cody, J. Barosch, L. Bejach, E. Dartois, A. Dazzi, B. De Gregorio, A. Deniset-Besseau, J. Duprat, C. Engrand, M. Hashiguchi, Z. Martins, J. Mathurin, G. Montagnac, S. Mostefaoui, L. R. Nittler, T. Ohigashi, T. Okumura, L. Rémusat, S. Sandford, R. Stroud, H. Suga, Y. Takahashi, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, S. Yamashita, H. Yurimoto, T. Nakamura, T. Noguchi, R. Okazaki, H. Naraoka, K. Sakamoto, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, T. Usui, M. Abe, T. Okada, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, S. Tachibana, S.-i. Watanabe and Y. Tsuda. Raman spectroscopy of Ryugu particles and their extracted residues: Fluorescence background characteristics and similarities to CI chondrites. Meteoritics & Planetary Science, 59, 2166-2185 (2024) doi: 10.1111/maps.14234

・L. R. Nittler, J. Barosch, K. Burgess, R. M. Stroud, J. Wang, H. Yabuta, Y. Enokido, M. Matsumoto, T. Nakamura, Y. Kebukawa, S. Yamashita, Y. Takahashi, L. Bejach, L. Bonal, G. D. Cody, E. Dartois, A. Dazzi, B. De Gregorio, A. Deniset-Besseau, J. Duprat, C. Engrand, M. Hashiguchi, A. L. D. Kilcoyne, M. Komatsu, Z. Martins, J. Mathurin, G. Montagnac, S. Mostefaoui, T. Okumura, E. Quirico, L. Remusat, S. Sandford, M. Shigenaka, H. Suga, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, D. Wakabayashi, M. Abe, K. Kamide, A. Miyazaki, A. Nakato, S. Nakazawa, M. Nishimura, T. Okada, T. Saiki, S. Tanaka, F. Terui, T. Usui, T. Yada, K. Yogata, M. Yoshikawa, H. Yurimoto, T. Noguchi, R. Okazaki, H. Naraoka, K. Sakamoto, S. Tachibana, S. Watanabe and Y. Tsuda. Microscale hydrogen, carbon, and nitrogen isotopic diversity of organic matter in asteroid Ryugu. Earth and Planetary Science Letters, 637, 118719 (2024) doi: 10.1016/j.epsl.2024.118719

・P. Northrup, R. Tappero, T. D. Glotch, G. J. Flynn, M. Yesiltas, Y. Kebukawa, L. Flores, M. E. Gemma and G. Piccione. Chemistry in Retrieved Ryugu Asteroid Samples Revealed by Non-Invasive X-ray Microanalyses: Pink-Beam Fluorescence CT and Tender-Energy Absorption Spectroscopy. Geosciences, 14, 111 (2024) doi: 10.3390/geosciences14040111

・M. Yesiltas, T. D. Glotch, Y. Kebukawa, B. Sava, Y. C. Durmaz, P. Northrup. Nanoscale spectroscopic identification and characterization of minerals and organic matter in Ryugu particles. Journal of Geophysical Research: Planets, 129, e2023JE008090 (2024) Doi: 10.1029/2023JE008090

・J. Mathurin, L. Bejach, E. Dartois, C. Engrand, A. Dazzi, A. Deniset-Besseau, J. Duprat, Y. Kebukawa, H. Yabuta, L. Bonal, E. Quirico, C. Sandt, F. Borondics, J. Barosch, P. Beck, G. D. Cody, B. T. De Gregorio, M. Hashiguchi, D. A. L. Kilcoyne, M. Komatsu, Z. Martins, M. Matsumoto, G. Montagnac, S. Mostefaoui, L. R. Nittler, T. Ohigashi, T. Okumura, V. T. H. Phan, L. Remusat, S. Sandford, M. Shigenaka, R. Stroud, H. Suga, Y. Takahashi, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, S. Yamashita, T. Nakamura, T. Morita, M. Kikuiri, K. Amano, E. Kagawa, T. Noguchi, H. Naraoka, R. Okazaki, K. Sakamoto, H. Yurimoto, M. Abe, K. Kamide, A. Miyazaki, A. Nakato, S. Nakazawa, M. Nishimura, T. Okada, T. Saiki, S. Tachibana, S. Tanaka, F. Terui, Y. Tsuda, T. Usui, S. Watanabe, T. Yada, K. Yogata, and M. Yoshikawa. AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission. Astronomy & Astrophysics, 684, A198 (2024) Doi: 10.1051/0004-6361/202347435

・R. M. Stroud, J. Barosch, L. Bonal, K. Burgess, G. D. Cody, B. T. De Gregorio, L. Daly, E. Dartois, E. Dobrică, J. Duprat, C. Engrand, D. Harries, M. Hashiguchi, H. Ishii, Y. Kebukawa, A. D. Kilcoyne, F. Langenhorst, M. R. Lee, L. R. Nittler, E. Quirico, T. Okumura, L. Remusat, S. Sandford, H. Yabuta, M. Abe, N. M. Abreu, P. A. J. Bagot, P. Beck, L. Bejach, P. A. Bland, J. C. Bridges, B. A. Cymes, A. Dazzi, F. de la Peña, A. Deniset-Besseau, S. Enju, Y. Enokido, D. R. Frank, J. Gray, M. Haruta, S. Hata, L. Hicks, Y. Igami, D. Jacob, K. Kamide, M. Komatsu, S. Laforet, H. Leroux, C. Le Guillou, Z. Martins, M. Marinova, J. Martinez, J. Mathurin, M. Matsumoto, T. Matsumoto, J. Matsuno, S. McFadzean, T. Michikami, I. Mitsukawa, A. Miyake, M. Miyahara, A. Miyazaki, G. Montagnac, S. Mostefaoui, T. Nakamura, A. Nakato, H. Naraoka, Y. Nakauchi, S. Nakazawa, M. Nishimura, T. Noguchi, K. Ohtaki, T. Ohigashi, T. Okada, S. Okumura, R. Okazaki, T. H. V. Phan, R. Rebois, K. Sakamoto, T. Saiki, H. Saito, Y. Seto, M. Shigenaka, W. Smith, H. Suga, M. Sun, S. Tachibana, Y. Takahashi, Y. Takeichi, A. Takeuchi, A. Takigawa, Y. Tamenori, S. Tanaka, F. Terui, M. S. Thompson, N. Tomioka, A. Tsuchiyama, Y. Tsuda, K. Uesugi, M. Uesugi, T. Usui, M. Verdier-Paoletti, D. Wakabayashi, S.-i. Watanabe, T. Yada, S. Yamashita, M. Yasutake, K. Yogata, M. Yoshikawa, H. Yurimoto, P.-M. Zanetta, T. Zega and M. E. Zolensky. Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro- to nano-scale. Meteoritics & Planetary Science, 59, 2023–2043 (2024) doi: 10.1111/maps.14128

・E. Quirico, L. Bonal, Y. Kebukawa, K. Amano, H. Yabuta, V. T. H. Phan, P. Beck, L. Rémusat, E. Dartois, C. Engrand, Z. Martins, L. Bejach, A. Dazzi, A. Deniset-Besseau, J. Duprat, J. Mathurin, G. Montagnac, J. Barosch, G. D. Cody, B. De Gregorio, Y. Enokido, M. Hashiguchi, K. Kamide, D. Kilcoyne, M. Komatsu, M. Matsumoto, S. Mostefaoui, L. Nittler, T. Ohigashi, T. Okumura, S. Sandford, M. Shigenaka, R. Stroud, H. Suga, Y. Takahashi, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, D. Wakabayashi, S. Yamashita, T. Nakamura, H. Naraoka, T. Noguchi, R. Okazaki, H. Yurimoto, K. Sakamoto, S. Tachibana, S.-I. Watanabe, Y. Tsuda, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui and S. Nakazawa. Compositional heterogeneity of insoluble organic matter extracted from asteroid Ryugu samples. Meteoritics & Planetary Science, 59, 1907–1924 (2024) doi: 10.1111/maps.14097

・Y. Kebukawa, E. Quirico, E. Dartois, H. Yabuta, L. Bejach, L. Bonal, A. Dazzi, A. Deniset-Besseau, J. Duprat, C. Engrand, J. Mathurin, J. Barosch, G. D. Cody, B. De Gregorio, M. Hashiguchi, K. Kamide, D. Kilcoyne, M. Komatsu, Z. Martins, G. Montagnac, S. Mostefaoui, L. R. Nittler, T. Ohigashi, T. Okumura, L. Remusat, S. Sandford, M. Shigenaka, R. Stroud, H. Suga, Y. Takahashi, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, D. Wakabayashi, S. Yamashita, H. Yurimoto, T. Nakamura, T. Noguchi, R. Okazaki, H. Naraoka, K. Sakamoto, S. Tachibana, T. Yada, M. Nishimura, A. Nakato, A. Miyazaki, K. Yogata, M. Abe, T. Okada, T. Usui, M. Yoshikawa, T. Saiki, S. Tanaka, F. Terui, S. Nakazawa, S.-i. Watanabe and Y. Tsuda. Infrared absorption spectra from organic matter in the asteroid Ryugu samples: Some unique properties compared to unheated carbonaceous chondrites. Meteoritics & Planetary Science, 59, 1845–1858 (2024) DOI: 10.1111/MAPS.14064

・M. Yesiltas, Y. Kebukawa. Extraterrestrial organic matter: an introduction. Elements, 20, 7-12 (2024) doi: 10.2138/gselements.20.1.7

・Y. Kebukawa, M. Yesiltas, T. D. Glotch. Analytical techniques for identification and characterization of extraterrestrial organic matter. Elements, 20, 38-44 (2024) doi: 10.2138/gselements.20.1.38

・A. Ishikawa, Y. Kebukawa, K. Kobayashi and I. Yoda. Gamma-ray-induced amino acid formation during aqueous alteration in small bodies: The effects of compositions of starting solutions. Life, 14, 103 (2024) doi: 10.3390/life14010103

・L. Bonal, E. Quirico, G. Montagnac, M. Komatsu, Y. Kebukawa, H. Yabuta, K. Amano, J. Barosch, L. Bejach, G. D. Cody, E. Dartois, A. Dazzi, B. De Gregorio, A. Deniset-Besseau, J. Duprat, C. Engrand, M. Hashiguchi, K. Kamide, D. Kilcoyne, Z. Martins, J. Mathurin, S. Mostefaoui, L. Nittler, T. Ohigashi, T. Okumura, L. Remusat, S. Sandford, M. Shigenaka, R. Stroud, H. Suga, Y. Takahashi, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, S. Yamashita, T. Nakamura, H. Naraoka, T. Noguchi, R. Okazaki, H. Yurimoto, S. Tachibana, M. Abe, A. Miyazaki, A. Nakato, S. Nakazawa, M. Nishimura, T. Okada, T. Saiki, K. Sakamoto, S. Tanaka, F. Terui, Y. Tsuda, T. Usui, S.-i. Watanabe, T. Yada, K. Yogata and M. Yoshikawa. The thermal history of Ryugu based on Raman characterization of Hayabusa2 samples. Icarus, 408, 115826 (2024) doi: 10.1016/j.icarus.2023.115826

・Y. Li, H. Kurokawa, Y. Sekine, Y. Kebukawa, Y. Nakano, N. Kitadai, N. Zhang, X. Zang, Y. Ueno, G. Fujimori, R. Nakamura, K. Fujishima and J. Isa. Aqueous breakdown of aspartate and glutamate to n-ω-amino acids on the parent bodies of carbonaceous chondrites and asteroid Ryugu. Science advances, 9, eadh7845 (2023) doi: 10.1126/sciadv.adh7845

・Y. Takao, O. Mori, J. Matsumoto, T. Chujo, S. Kikuchi, Y. Kebukawa, M. Ito, T. Okada, J. Aoki, K. Yamada, T. Sawada, S. Kawasaki, S. Kashioka, Y. Oki, T. Saiki and J. Kawaguchi. Sample return system of OKEANOS—The solar power sail for Jupiter Trojan exploration. Acta Astronautica, 213, 121-137 (2023) doi: 10.1016/j.actaastro.2023.08.044

・N. Hirakawa, Y. Kebukawa, T. Shibuya, H. Ueda, K. Kobayashi. Experimental synthesis of Fe-bearing olivine at near-solidus temperatures and its decomposition during longtime heating. Journal of Mineralogical and Petrological Sciences, 118, 220913 (2023) doi: 10.2465/jmps.220913

・Y. Kebukawa, J. Mathurin, E. Dartois, A. Dazzi, A. Deniset-Besseau, J. Duprat, L. Remusat, T. Noguchi, A. Miyake, Y. Igami, M. V. Paoletti, M. E. Zolensky, C. Engrand, C. Sandt, F. Borondics, S. Yamashita, D. Wakabayashi, Y. Takeichi and Y. Takahashi. Complex mixture of organic matter in a xenolithic clast from the Zag meteorite revealed by coordinated analyses using AFM-IR, NanoSIMS and STXM/XANES. Icarus, 400, 115582 (2023) doi: 10.1016/j.icarus.2023.115582

・K. Kobayashi, J. Ise, R. Aoki, M. Kinoshita, K. Naito, T. Udo, B. Kunwar, J. Takahashi, H. Shibata, H. Mita, H. Fukuda, Y. Oguri, K. Kawamura, Y. Kebukawa and V. S. Airapetian. Formation of Amino Acids and Carboxylic Acids in Weakly Reducing Planetary Atmospheres by Solar Energetic Particles from the Young Sun. Life, 13, 1103 (2023) doi: 10.3390/life13051103

・E. Dartois, Y. Kebukawa, H. Yabuta, J. Mathurin, C. Engrand, J. Duprat, L. Bejach, A. Dazzi, A. Deniset-Besseau, L. Bonal, E. Quirico, C. Sandt, F. Borondics, J. Barosch, G. D. Cody, B. T. De Gregorio, M. Hashiguchi, D. A. L. Kilcoyne, M. Komatsu, Z. Martins, M. Matsumoto, G. Montagnac, S. Mostefaoui, L. R. Nittler, T. Ohigashi, T. Okumura, L. Remusat, S. Sandford, M. Shigenaka, R. Stroud, H. Suga, Y. Takahashi, Y. Takeichi, Y. Tamenori, M. Verdier-Paoletti, S. Yamashita, T. Nakamura, T. Morita, M. Kikuiri, K. Amano, E. Kagawa, T. Noguchi, H. Naraoka, R. Okazaki, K. Sakamoto, H. Yurimoto, M. Abe, K. Kamide, A. Miyazaki, A. Nakato, S. Nakazawa, M. Nishimura, T. Okada, T. Saiki, S. Tachibana, S. Tanaka, F. Terui, Y. Tsuda, T. Usui, S. Watanabe, T. Yada, K. Yogata and M. Yoshikawa. Chemical composition of carbonaceous asteroid Ryugu from synchrotron spectroscopy in the mid- to far-infrared of Hayabusa2-returned samples. Astronomy & Astrophysics, 671, A2 (2023) doi: 10.1051/0004-6361/202244702

・H. Yabuta, G. D. Cody, C. Engrand, Y. Kebukawa, B. De Gregorio, L. Bonal, L. Remusat, R. Stroud, E. Quirico, L. Nittler, M. Hashiguchi, M. Komatsu, T. Okumura, J. Mathurin, E. Dartois, J. Duprat, Y. Takahashi, Y. Takeichi, D. Kilcoyne, S. Yamashita, A. Dazzi, A. Deniset-Besseau, S. Sandford, Z. Martins, Y. Tamenori, T. Ohigashi, H. Suga, D. Wakabayashi, M. Verdier-Paoletti, S. Mostefaoui, G. Montagnac, J. Barosch, K. Kamide, M. Shigenaka, L. Bejach, M. Matsumoto, Y. Enokido, T. Noguchi, H. Yurimoto, T. Nakamura, R. Okazaki, H. Naraoka, K. Sakamoto, H. C. Connolly, D. S. Lauretta, M. Abe, T. Okada, T. Yada, M. Nishimura, K. Yogata, A. Nakato, M. Yoshitake, A. Iwamae, S. Furuya, K. Hatakeda, A. Miyazaki, H. Soejima, Y. Hitomi, K. Kumagai, T. Usui, T. Hayashi, D. Yamamoto, R. Fukai, S. Sugita, K. Kitazato, N. Hirata, R. Honda, T. Morota, E. Tatsumi, N. Sakatani, N. Namiki, K. Matsumoto, R. Noguchi, K. Wada, H. Senshu, K. Ogawa, Y. Yokota, Y. Ishihara, Y. Shimaki, M. Yamada, C. Honda, T. Michikami, M. Matsuoka, N. Hirata, M. Arakawa, C. Okamoto, M. Ishiguro, R. Jaumann, J.-P. Bibring, M. Grott, S. Schröder, K. Otto, C. Pilorget, N. Schmitz, J. Biele, T.-M. Ho, A. Moussi-Soffys, A. Miura, H. Noda, T. Yamada, K. Yoshihara, K. Kawahara, H. Ikeda, Y. Yamamoto, K. Shirai, S. Kikuchi, N. Ogawa, H. Takeuchi, G. Ono, Y. Mimasu, K. Yoshikawa, Y. Takei, A. Fujii, Y. Iijima, S. Nakazawa, S. Hosoda, T. Iwata, M. Hayakawa, H. Sawada, H. Yano, R. Tsukizaki, M. Ozaki, F. Terui, S. Tanaka, M. Fujimoto, M. Yoshikawa, T. Saiki, S. Tachibana, S. Watanabe and Y. Tsuda. Macromolecular organic matter in samples of the asteroid (162173) Ryugu. Science, 379, eabn9057 (2023) doi:10.1126/science.abn9057