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New study says Earth’s water could come from the sun

According to an article published in the journal Nature Astronomy on the 29th, an international research team led by the University of Glasgow discovered that water on the ground can come from “the sky” – the sun. The solar wind is made up of charged particles (mostly hydrogen ions) from the sun, and water has been produced on the surface of dust particles carried by asteroids that struck the earth at the start of the solar system.
Phil Brand, director of the Space Science and Technology Center at Curtin University, Australia, said that compared to other rocky planets in the solar system, Earth’s water resources are very rich, and the ocean covers about 70 % of the Earth’s surface. Scientists have been confused about the exact source of the water for a long time.
Brand said, “Existing theories suggest that water was brought to Earth in the final stage of the formation of Type C asteroids (asteroids containing carbon). However, previous tests of the isotopic fingerprints of these asteroids found, on average, do not match the water found on Earth, meaning there is at least one other unknown source.

This study shows that the solar wind produces water on the surface of tiny dust particles, and this lighter isotope of water is likely to provide a source of water for the earth.
S-type asteroids are asteroids whose main component is silicon and are the second largest group of stars after C-type asteroids. By analyzing the tiny fragments of the near-Earth S-type asteroid “Sichuan” atom by atom, the researchers proposed this new “solar wind theory”. The debris sample was collected by the Japanese asteroid probe Hayabusa and brought back to Earth in 2010.
Curtin University’s world-class atomic tomography tomography system in Australia enables researchers to observe nanoscale dust particles on the surface of the asteroid “Sichuan” in detail. They found that these particles contained enough water, which, if scaled up, would equate to about 20 liters of water per cubic meter of rock.
Dr Luke Daly from the University of Glasgow said this research not only helps scientists understand the source of the earth’s water resources, but also helps future space missions.
“How astronauts can get enough water without carrying supplies is one of the obstacles to future space exploration.” Daly said, “Research shows that the space-weathering process that produces water on the asteroid ‘Sichuan’ is very likely. It also happens on other airless planets, which means astronauts may be able to produce fresh water directly from dust on the planet’s surface, such as on the moon.
Where does water come from on earth? This is an important scientific question. During the evolution of the earth, water has played a key role. Researchers have put forward various hypotheses, such as water that was knocked out by a comet or asteroid, or that the earth was “born” by its ability and was hidden in the crust and mantle when it sank. ‘is formed. Others believe that the water is blown by the solar wind. The research mentioned in this article supports the solar wind hypothesis. They analyzed the tiny asteroid fragments and found that the solar wind produced tiny dust particles on the surface of water. This will not only help solve the mystery of the origin of Earth’s water, but also provide new ideas for future astronauts to solve the problem of water sources in space.


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