Tag Archives: Olympia Undae

THEMIS: Patterns on patterns in Olympia Undae

Posted on September 4, 2019 by rburnham

THEMIS Image of the Day, September 4, 2019. Today’s VIS image shows part of Olympia Undae, the largest of several dune fields that encircle the north polar cap. (It is also known as the north polar sand sea.) This image … Continue reading →

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THEMIS: Patterns on patterns in the Olympia Undae dunes

Posted on July 19, 2019 by rburnham

THEMIS Image of the Day, July 19, 2019. Today’s VIS image shows a small portion of Olympia Undae. Olympia Undae is a large dune field that dominates the plains along part of the north polar cap. This image was collected … Continue reading →

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HiRISE: A song of dune and ice

Posted on June 5, 2019 by rburnham

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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THEMIS: On the shore of a sea of sand

Posted on June 20, 2018 by rburnham

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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THEMIS: Frost-free dunes in the north polar sand sea

Posted on May 25, 2018 by rburnham

THEMIS Image of the Day, May 25, 2018. This VIS image shows part of Olympia Undae, a large dune field that surrounds part of the north polar cap. At the top of the image the dunes are small and isolated. … Continue reading →

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THEMIS: Frost-free dunes in north polar sand sea

Posted on March 16, 2018 by rburnham

THEMIS Image of the Day, March 16, 2018. This VIS image was collected at the height of summer. It is during this season that winds are able to move sand sized particles, slowly modifying the dunes. Olympia Undae is a … Continue reading →

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THEMIS: Dunes in transition

Posted on March 15, 2018 by rburnham

THEMIS Image of the Day, March 15, 2018. This VIS image highlights the dune form/dune density aspects of Olypmia Undae. In the center there is a brighter, diagonal region of few dunes. These dunes are the arc or crescent shape … Continue reading →

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THEMIS: Dunes, lacy and regular

Posted on March 14, 2018 by rburnham

THEMIS Image of the Day, March 14, 2018. This VIS image hightlights the density of dunes, the bottom third of the image has fewer dunes, spaced farther apart than the top two thirds of the image. The bottom of the … Continue reading →

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THEMIS: Is that gypsum under the dunes?

Posted on March 13, 2018 by rburnham

THEMIS Image of the Day, March 13, 2018. This VIS image of Olympia Undae was collected during north polar summer. The dunes are now completely frost free and are dark in color due to being made of basaltic sand. The … Continue reading →

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THEMIS: Edge of the great northern sand sea

Posted on March 12, 2018 by rburnham

THEMIS Image of the Day, March 12, 2018. This VIS image of Olympia Undae was collected during north polar summer. The dunes are now completely frost free and are dark in color due to being made of basaltic sand. The … Continue reading →

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