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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface 5nvklj





Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface 9tpt39

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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface

Dragon
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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface Empty Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface

Post by Dragon Mon Oct 11, 2021 1:16 am

Scientists thought asteroid Bennu's surface would be like a sandy beach, abundant in fine sand and pebbles, which would have been perfect for collecting samples.

Past telescope observations from Earth's orbit had suggested the presence of large swaths of fine-grain material called fine regolith that's smaller than a few centimeters.

But when the spacecraft of NASA's University of Arizona-led OSIRIS-REx asteroid sample return mission arrived at Bennu in late 2018, the mission team saw a surface covered in boulders.

The mysterious lack of fine regolith became even more surprising when mission scientists observed evidence of processes capable of grinding boulders into fine regolith.


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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface 334pu7m
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Post by Dragon Mon Oct 11, 2021 1:17 am

Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface Highly-porous-rocks-re
Credit: NASA / Goddard / University of Arizona

OSIRIS-REx mission scientists thought sampling a piece of Bennu would be like a walk on the beach, but the surprisingly craggy surface proved to be more of a challenge.


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Post by Dragon Mon Oct 11, 2021 1:19 am



SMOS 10 years in orbit

SMOS has been in orbit for a decade. This remarkable satellite has not only exceeded its planned life in orbit, but also surpassed its original scientific goals.

It was designed to deliver data on soil moisture and ocean salinity which are both crucial components of Earth’s water cycle.

By consistently mapping these variables, SMOS is not only advancing our understanding of the water cycle and the exchange processes between Earth’s surface and the atmosphere, but is also helping to improve weather forecasts and contributing to climate research as well as contributing to a growing number practical everyday applications.


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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface 334pu7m
Dragon
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Post by Dragon Mon Oct 11, 2021 1:20 am



Asteroid Bennu's Journey

Bennu's Journey is a 6-minute animated movie about NASA's OSIRIS-REx mission, Asteroid Bennu, and the formation of our solar system.

Born from the rubble of a violent collision, hurled through space for millions of years, Asteroid Bennu has had a tough life in a rough neighborhood - the early solar system.

Bennu's Journey shows what is known and what remains mysterious about the evolution of Bennu and the planets.

By retrieving a sample of Bennu, OSIRIS-REx will teach us more about the raw ingredients of the solar system and our own origins.


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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface 334pu7m
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Post by Dragon Mon Oct 11, 2021 1:22 am

Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface Nasaspacecra
(NASA/Goddard/University of Arizona via AP)

his combination of 2019 and 2021 images made available by NASA shows how the local surface of Bennu changed after the OSIRIS-REx spacecraft took a sample of the asteroid on Oct. 20, 2020.

The earlier image, top, was taken on March 7, 2019, and the bottom was taken on April 7, 2021, as part of final observations to document the surface after sample acquisition.

The Nightingale site is located in the relatively clear patch just above the crater's center – visible in the center of the earlier image.

The large, dark boulder located at the center right measures 43 feet (13 meters) on its longest axis.


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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface 334pu7m
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Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface Empty Re: Highly porous rocks are responsible for asteroid Bennu's surprisingly craggy surface

Post by Dragon Mon Oct 11, 2021 1:24 am



OSIRIS-REx Leaves its Mark on Bennu

Like boot prints on the Moon, NASA's OSIRIS-REx spacecraft left its mark on asteroid Bennu.

Now, new images — taken during the spacecraft's final fly-over on April 7, 2021 — reveal the aftermath of the historic Touch-and-Go (TAG) sample acquisition event from Oct. 20, 2020.


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