Tag Archives: north polar sand sea

HiRISE: A song of dune and ice

A song of dune and ice. This image shows rare dunes superposed on elements of the polar cap near Olympia Undae, which is a vast dune field in the north polar region of Mars. HiRISE Picture of the Day archive. … Continue reading

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HiRISE: A frosted surface

This is the first of a new monitoring series to track seasonal processes. It is also a striking image with late winter angled illumination over dunes covered by carbon dioxide frost mixed with dust. Dark spots may be where sand … Continue reading

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HiRISE: Dunes in the shapes of Ts and Vs

Dunes in the shapes of Ts and Vs. They also look like funnel shapes. Beautiful Mars series. [More at links]

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THEMIS: North polar dunes meet Escorial Crater

THEMIS Image of the Day, September 25, 2018. At the bottom of this image is Escorial Crater. The dune field to the north are called Hyperboreae Undae. The subtle blue and yellow arcs over the crater are clouds. The THEMIS … Continue reading

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HiRISE: The other Pan’s labyrinth

The other Pan’s labyrinth. These polar dunes are located near source of gypsum. Beautiful Mars series. [More at links]

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THEMIS: Dunes and Escorial Crater ejecta in false color

THEMIS Image of the Day, September 13, 2018. The ‘brown’ in this VIS image is part of the ejecta surrounding Escorial Crater. The material of the ejecta blanket is much more resistant to local winds and remains as a plateau … Continue reading

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THEMIS: Siton Undae dunes in false color

THEMIS Image of the Day, September 12, 2018. The blue features in this VIS image are sand dunes located near Escorial Crater and the north polar cap. The dune field is called Siton Undae. The THEMIS VIS camera contains 5 … Continue reading

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THEMIS: On the shore of a sea of sand

THEMIS Image of the Day, June 20, 2018. This VIS image shows a small part of the huge northern dune field called Olympia Undae. This dune field surrounds 1/3 of the north polar cap. Collected in northern summer, there is … Continue reading

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HiRISE: Of dunes and their stories

Of dunes and their stories. So far no seasonal changes have been detected here, making this site unique. Beautiful Mars series. [More at links]

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HiRISE: Corduroy dunes

Corduroy dunes. The permanent polar cap of Mars is encircled by sand dunes and looking like pulled threads, these dunes march across a fabric of patterned ground. At this time of the Martian year they are free of the seasonal … Continue reading

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