Water has been discovered on the asteroid Bennu. Free Technical Library News

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Water found on asteroid Bennu

06.12.2018

The OSIRIS-REx probe, sent in September 2016 to the asteroid Bennu, flew 2,2 million km and arrived at its destination a week ago. It approached the celestial body and moves next to it at a distance of about 10 km. At the rendezvous stage, which lasted from mid-August to early December, the apparatus began scientific observations.

Data obtained with spectrometers showed the presence of molecules containing hydroxyl groups, that is, oxygen and hydrogen atoms bonded together.

The scientists believe these hydroxyl groups are found throughout the asteroid in water-bearing clay minerals, meaning that at some point Bennu's rock material interacted with water. The asteroid itself is too small to hold liquid water, but the findings indicate that liquid water was present for some time on the much larger asteroid from which Bennu broke off.

The researchers note that the data obtained using the OSIRIS-REx cameras confirm Bennu's ground-based telescopic observations and the asteroid model developed in 2013. In turn, the presence of hydrated minerals makes the asteroid Bennu, which appeared during the formation of the solar system, very well suited for the OSIRIS-REx mission to study the composition of primitive volatile and organic substances. The probe is to take soil samples from Bennu and bring them back to Earth in 2023. Scientists hope to obtain from them important information about the history and development of the solar system.

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