A high-resolution camera mounted on NASA's Mars Reconnaissance Orbiter (MRO)
Dunes appear as slightly asymmetrical patchesin the picture. It was taken on November 22, 2022 in the northern hemisphere of Mars as part of the University of Arizona's high-resolution imaging experiment (HiRise). The steep slopes of the dunes slope towards the south. Scientists have linked this to Martian winds. However, they don't know why the dunes are perfectly round.
Image courtesy of NASA/JPL-Caltech/University of Arizona
Изображение — часть серии, сделанной камерой HiRise. The goal of the project is to track how frost melts on Mars in 60 different locations. Like Earth, Mars experiences a cycle of four seasons—summer, spring, autumn, and winter. While the circular sand dunes appear ice-free in the new photos, previous HiRise images show them covered in frost.
Image courtesy of NASA/JPL-Caltech/University of Arizona
HiRise camera installed on spaceMRO spacecraft has been exploring sand dunes on Mars since 2006 to help scientists understand how these structures move and how they are affected by weather conditions. Data from the high-resolution camera show that sand dunes migrate from the equator to the poles at speeds of up to a meter per Martian year, or 687 Earth days.
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