Asteroid Ryugu contains dust older than the solar system

Ancient dust grains older than the solar system itself were found in samples from the asteroid Ryugu brought to Earth by the Japanese spacecraft Hayabusa2 nearly two years ago.

The presence of this pre-solar material in Ryugu is not a surprise, because similar ancient grains have already been found in several carbonaceous chondrite meteorites, which are pieces of carbon-rich space rock that survived the fall earth’s atmosphere land on the planet.

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