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Asteroids may have brought water to Earth

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C-type asteroids like Ryugu, rich in volatile substances [capables de passer facilement de l’état solide à l’état gazeux, NDLR] and organic [ou carbonées, NDLR]may have been one of the main sources of water on Earthaccording to this study by Japanese and foreign researchers.

The contribution to the Earth of volatile substances, i.e. organic matter and water, is still the subject of an important debate.recalls the study.

But the organic substances identified on Ryugu probably represent an important source of volatile substancesin addition to other potential sources such as solar winds, according to the same researchers.

Planet Earth appears in space.

The contribution to the Earth of volatile substances, that is to say organic matter and water, is still the subject of an important debate, recalls the study.

Photo: iStock

Particles reported from Ryugu are undoubtedly among the least contaminated solar system materials available for laboratory study, and ongoing research on these valuable samples will certainly expand our understanding of early solar system processes.they still estimated.

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Discovered in 1999, Ryugu (Dragon Palace, in Japanese) is located more than 300 million kilometers from our planet and is less than 900 meters in diameter.

Scientists believe that some of the material from this asteroid was created about 5 million years after the birth of our solar system and was not heated above 100 degrees Celsius.

In 2019, the Japanese probe Hayabusa-2 managed to collect 5.4 grams of rock and black dust from Ryugu, and a capsule containing this exceptional cargo returned to Earth at the end of 2020, with the promise of delivering new clues about the origin of life on Earth.

In June, another Japanese scientific study had thus revealed the presence in these samples of amino acids, molecules at the base of life, because capable of forming proteins by combining with each other.

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