Study suggests Sun is likely an unaccounted source of the Earth’s water

0

Graphic of the sun, solar winds and itokawa. Credit: Curtin University

Curtin University researchers have helped unravel the enduring mystery of the origins of the Earth’s water, finding the Sun to be a surprising likely source.

A University of Glasgow-led international team of researchers including those from Curtin’s Space Science and Technology Center (SSTC) found the solar wind, comprised of charged particles from the Sun largely made of hydrogen ions, created water on the surface of dust grains carried on asteroids that smashed into the Earth during the early days of the Solar System.

SSTC Director, John Curtin Distinguished Professor Phil Bland said the Earth was very water-rich compared to other rocky planets in the Solar System, with oceans covering more than 70 percent of its surface, and scientists had long puzzled over the exact source of it all.

“An existing theory is that water was carried to Earth in the final stages of its formation on C-type asteroids, however previous testing of the isotopic ‘fingerprint’ of these asteroids found they, on average, didn’t match with the water found on Earth meaning there was at least one other unaccounted for source,” Professor Bland said.

“Our research suggests the solar wind created water on the surface of tiny dust grains and this isotopically lighter water likely provided the remainder of the Earth’s water.

“This new solar wind theory is based on meticulous atom-by-atom analysis of miniscule fragments of an S-type near-Earth asteroid known as Itokawa, samples of which were collected by the Japanese space probe Hayabusa and returned to Earth in 2010.

“Our world-class atom probe tomography system here at Curtin University allowed us to take an incredibly detailed look inside the first 50 nanometres or so of the surface of Itokawa dust grains, which we found contained enough water that, if scaled up, would amount to about 20 liters for every cubic meter of rock.”

Curtin graduate Dr. Luke Daly, now of the University of Glasgow, said the research not only gives scientists a remarkable insight into the past source of Earth’s water, but could also help future space missions.

“How astronauts would get sufficient water, without carrying supplies, is one of the barriers of future space exploration,” Dr. Daly said.

“Our research shows that the same space weathering process which created water on Itokawa likely occurred on other airless planets, meaning astronauts may be able to process fresh supplies of water straight from the dust on a planet’s surface, such as the Moon.”

The paper, “Solar wind Contributions to the Earth’s Oceans,” was published in Nature Astronomy.


Researchers discover how water is regenerated on asteroids


More information:
Luke Daly, Solar wind contributions to Earth’s oceans, Nature Astronomy (2021). DOI: 10.1038/s41550-021-01487-w. www.nature.com/articles/s41550-021-01487-w

Provided by
Curtin University


Citation:
Study suggests Sun is likely an unaccounted source of the Earth’s water (2021, November 29)
retrieved 29 November 2021
from https://phys.org/news/2021-11-sun-unaccounted-source-earth.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.

FOLLOW US ON GOOGLE NEWS

 

Read original article here

Denial of responsibility! Samachar Central is an automatic aggregator of the all world’s media. In each content, the hyperlink to the primary source is specified. All trademarks belong to their rightful owners, all materials to their authors. If you are the owner of the content and do not want us to publish your materials, please contact us by email – [email protected]. The content will be deleted within 24 hours.

Leave a comment