Direct samples from near-Earth asteroid Ryugu provide scientists a glimpse into the raw materials of solid matter in the outer regions of the early solar system. Since as far back as Ancient Greece, humans have been fascinated by the solar system. However, Japanese researchers have now collected as
The new information from the Ryugu samples might contribute to the redefinition of the standard elemental compositions of solid materials in the solar system.
Asteroid explorer Hayabusa2, launched in 2014, set out for Ryugu, a carbon-rich C-type asteroid. In 2018, it arrived in the area of Ryugu, conducting a number of remote observations and collecting samples from two locations on the asteroid. Before the launch of Hayabusa2, a research team at Osaka University had been developing a non-destructive method of light element analysis utilizing muons to analyze Ryugu.
Figure 2: Comparison between muonic X-ray spectra from the Ryugu sample and the Orgueil CI chondrite. Credit: Muon Analysis Team Figure 3: Comparison of the elemental compositions of the Ryugu sample and the Orgueil CI chondrite , showing the relatively lower oxygen content in the Ryugu sample compared with CI chondrite. Credit: Muon Analysis Team
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