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Dagens mediefil |
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2. december 2024 |
A virtual tour of Bennu, a carbonaceous near-Earth asteroid. The OSIRIS-REx spacecraft arrived at this spot, nearly 130 million km from Earth, six years ago on 3 December.
"Bennu is made of loose material weakly clumped together by gravity, and shaped like a spinning top. […] Scientists had expected Bennu’s surface to consist of fine-grained material like a sandy beach, but were instead greeted by a rugged world littered with boulders – the size of cars, the size of houses, the size of football fields. Now, thanks to laser altimetry data and high-resolution imagery from OSIRIS-REx, we can take a tour of Bennu’s remarkable terrain." |
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"Bennu is made of loose material weakly clumped together by gravity, and shaped like a spinning top. […] Scientists had expected Bennu’s surface to consist of fine-grained material like a sandy beach, but were instead greeted by a rugged world littered with boulders – the size of cars, the size of houses, the size of football fields. Now, thanks to laser altimetry data and high-resolution imagery from OSIRIS-REx, we can take a tour of Bennu’s remarkable terrain."
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Roman architect and engineer Vitruvius described the aeolipile for an experiment to demonstrate the nature of atmospheric air movements (wind) in his Ten Books on Architecture (30–20 BCE).
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It left the asteroid in November 2019 and returned the samples to Earth on 5 December 2020. In 2031, it is expected to rendezvous with the small, rapidly-rotating asteroid 1998 KY26.
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