..., according to the microstructural evolution with shock pressure. Above ∼6 GPa, the dislocations nucleated homogeneously throughout the calcite crystals. The dislocation microstructure in a calcite grain collected from the asteroid Ryugu particle is similar to that of the experimentally shocked calcite at 4.2...

...Figure 1. ( A ) C-type asteroid Ryugu. Its diameter is ~900 m. P hoto : JAXA, Univ. T okyo , K ochi U niv ., R ikkyo U niv ., N agoya U niv ., C hiba I nst . T ech ., M eiji U niv ., U niv . A izu , and AIST. ( B ) Schematic illustration of Hayabusa2 . ( C ) Images taken soon after...

... MODIFICATION OF THE CARBONACEOUS ASTEROID RYUGU INFERRED FROM PETROLOGICAL AND MINERALOGICAL SIGNATURES OF THE RETURNED SAMPLES Megumi Matsumoto1 and Toru Matsumoto2 Asteroids are thought to be remnants of planet formation that can provide clues to the origin and evolution of the Solar System. The Hayabusa2...

..., and our daily lives is presented in Chapter 12. Additionally, this book also offers an exhaustive introduction to the Hayabusa2 spacecraft and its trophy-like collection of samples from the Ryugu asteroid (Chapter 11). This captivating and unique content will undoubtedly attract readers from many...

...Figure 5. Observation of asteroid Ryugu by the Hayabusa2 spacecraft. ( A ) Visible light images of Ryugu taken with the Optical Navigation Camera–Telescopic (ONC-T) from 20 km altitude on July 10, 2018. ( B ) Normalized intensity of the 2.72-μm feature obtained with the Near-Infrared Spectrometer...

... features in their reflectance spectra; this is related to water absorption. Based on the analysis of the Ryugu samples, the absence of the 2.7-µm absorption band can be partly explained by surface dehydration resulting from space weathering, suggesting that asteroids showing apparently dry surfaces may...

... at Johnson Space Center (USA). Most recently, he analyzed organic matter in surface regolith grains from the asteroid Ryugu by the JAXA Hayabusa2 mission as part of the Hayabusa2 Initial Analysis Team. Timothy D. Glotch is a professor of geosciences at Stony Brook University, USA. He uses vibrational...

... the asteroid Ryugu ( Fig. 7.5 ) in February, 2019 for eventual return to Earth ( https://www.nytimes.com/2019/02/21/science/ryugu-asteroid-hayabusa2.html ). Unlike the Earth, Moon, and Mars, asteroids tend to be more homogenous and little changed since primary accretion from the solar nebula. Thus, although...

... carbonaceous chondrites from Antarctica . Origins of Life and Evolution of the Biosphere 29 : 187 - 201 , doi: 10.1023/A:1006547127028 Naraoka H and 114 coauthors ( 2023 ) Soluble organic molecules in samples of the carbonaceous asteroid (162173) Ryugu . Science 379 : abn9033 , doi...

... small bodies in the early Solar System. After relocating to Tohoku University, she applied combined analysis to asteroid Ryugu samples collected by the Hayabusa 2 sample return mission and discovered fluid inclusions of carbonated water and evidence of impacts of cometary dust on the asteroid Ryugu...

... ; Dodds et al. 2021 ). Figure 2. Bulk chondrite carbon and water contents for ordinary chondrites (OC), carbonaceous chondrites (individual groups are prefixed with C), the unique carbonaceous chondrite, Tagish Lake (TL), and for asteroid Ryugu which is comparable to CI1 chondrites. Data are from...

.... Asteroids have even lower gravitational fields than the moon, and likewise no atmosphere. Thus, maneuvering around them is relatively straightforward, as was recently demonstrated by the Japanese spacecraft Hayabusa2 that landed on and extracted samples from the asteroid Ryugu in February 2019 ( https...

... successfully brought back samples from asteroid 25143-Itokawa, an S-type (“stony”) asteroid that has experienced high temperatures. Nevertheless, it contains small amounts of organic matter. More recently, JAXA’s Hayabusa2 spacecraft returned samples from C-type asteroid 162173-Ryugu and unraveled its...

... and contributed to the sample collection at asteroid Ryugu, as well as the analysis of Ryugu samples. He has also participated in astronomical observations to understand Solar System evolution in the broader context of planetary system formation in space. He is currently a professor at the UTokyo Organization...

... of the Meteoritical Society in Glasgow goes to Kaitlyn McCain (University of California, Los Angeles, USA) for the talk entitled Early fluid activity on the Ryugu parent asteroid inferred from 53Mn-53Cr ages of Ryugu carbonate. The award comes with a prize of US$1,000 and a certificate. The WILEY-BLACKWELL AWARD...