Asteroid Ryugu has no dust on it and we don’t know why

The most detailed pictures yet of the asteroid Ryugu have revealed something curious: it is surprisingly free of dust.

Japan’s Hayabusa 2 spacecraft arrived at the asteroid in June 2018, dropped three landers and took a sample of dust from Ryugu’s surface. Now, pictures from one of the landers have revealed details about what the asteroid is made up of.

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