Results 11 to 20 of about 3,943 (246)

Uracil in the carbonaceous asteroid (162173) Ryugu

open access: yesNature 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   +32 more
doaj   +4 more sources

Asteroid Ryugu before the Hayabusa2 encounter [PDF]

open access: yesProgress in Earth and Planetary Science, 2018
Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA).
Koji Wada   +34 more
doaj   +8 more sources

Unraveling the Cr Isotopes of Ryugu: An Accurate Aqueous Alteration Age and the Least Thermally Processed Solar System Material

open access: yesThe Astrophysical Journal
The analysis of samples returned from the C-type asteroid Ryugu has drastically advanced our knowledge of the evolution of early solar system materials.
Ryoji Tanaka   +25 more
doaj   +2 more sources

Surface Ages for the Sample Return Asteroids Bennu, Ryugu, and Itokawa

open access: yesThe Planetary Science Journal
The OSIRIS-REx, Hayabusa2, and Hayabusa missions have returned samples from three near-Earth asteroids (NEAs), namely Bennu, Ryugu, and Itokawa, respectively.
William F. Bottke   +8 more
doaj   +2 more sources

JWST Spectroscopy of (142) Polana: Connection to NEAs (101955) Bennu and (162173) Ryugu

open access: yesThe Planetary Science Journal
The new Polana collisional family is the hypothesized origin of the near-Earth asteroids (101955) Bennu, which was the target of the NASA OSIRIS-REx mission, and (162173) Ryugu, which was the target of the JAXA Hayabusa2 mission.
Anicia Arredondo   +5 more
doaj   +2 more sources

Solar System’s earliest solids as tracers of the accretion region of Ryugu and Ivuna-type carbonaceous chondrites

open access: yesCommunications Earth & Environment
Samples from the carbonaceous asteroid Ryugu and CI (Ivuna-type) chondrites are dominated by low-temperature, aqueously formed secondary minerals, with rare occurrences of anhydrous primary minerals that formed in the high-temperature region of the solar
Noriyuki Kawasaki   +6 more
doaj   +2 more sources

Presolar Stardust in Asteroid Ryugu [PDF]

open access: yesThe Astrophysical Journal Letters, 2022
Abstract We have conducted a NanoSIMS-based search for presolar material in samples recently returned from C-type asteroid Ryugu as part of JAXA's Hayabusa2 mission. We report the detection of all major presolar grain types with O- and C-anomalous isotopic compositions typically identified in carbonaceous chondrite meteorites: 1 silicate,
Barosch, Jens   +199 more
openaire   +8 more sources

The Asteroid 162173 Ryugu: a Cometary Origin [PDF]

open access: yesThe Astrophysical Journal Letters, 2021
Abstract The Japanese Hayabusa2 mission has revealed in detail the physical characteristics of the C-type asteroid 162173 Ryugu, in particular, its spinning top-shaped rubble-pile structure and potentially high organic content. A widely accepted formation scenario for Ryugu is catastrophic collision between larger asteroids and the ...
Hitoshi Miura   +2 more
openaire   +1 more source

Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites

open access: yesScience, 2022
Carbonaceous meteorites are thought to be fragments of C-type (carbonaceous) asteroids. Samples of the C-type asteroid (162173) Ryugu were retrieved by the Hayabusa2 spacecraft.
T. Yokoyama   +148 more
semanticscholar   +1 more source

The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites. [PDF]

open access: yesSci Adv
The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu/CI chondrites formed in a different region of the ...
Spitzer F   +90 more
europepmc   +3 more sources

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