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Nasa spacecraft finds water in search for origins of life on asteroid

A Nasa spacecraft that just arrived on an asteroid has already made its first big discovery: ingredients for water.

Scientists hope that the OSIRIS-REx spacecraft will shed light on the mysteries of Bennu, an asteroid the size of a skyscraper that could hold clues to the origins of life on Earth.

The craft only arrived at the asteroid in recent days but the discovery of water is a major breakthrough that scientists hope can be matched by more discoveries in the future.

It was found when OSIRIS-REx flew close to the asteroid and picked up traces of hydrogen and oxygen molecules in its rocky surface. Those make up part of the recipe for water – itself a key ingredient in life itself.

The probe, on a mission to return samples from the asteroid to Earth for study, was launched in 2016. Bennu, roughly a third of a mile wide (500 meters), orbits the sun at roughly the same distance as Earth. There is concern among scientists about the possibility of Bennu impacting Earth late in the 22nd century.

“We have found the water-rich minerals from the early solar system, which is exactly the kind of sample we were going out there to find and ultimately bring back to Earth,” University of Arizona planetary scientist Dante Lauretta, the OSIRIS-REx mission’s principal investigator, said in a telephone interview.

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