Hayabusa2 is an asteroid sample-return mission operated by the Japan Aerospace Exploration Agency (JAXA), which investigated the asteroid Ryugu. Carbonaceous asteroids like Ryugu are important because they are thought to preserve the most pristine, untainted materials in the solar system: a mixture of minerals, ice and organic compounds. The Haybusa2 mission is the first to collect samples from a carbonaceous asteroid and return them to Earth for analysis.
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Source: Phys.org