Tag Archives: Mars Odyssey

THEMIS: South polar ice cap layers

THEMIS Image of the Day, December 31, 2018. This VIS image is located along the edge of the south polar cap. In the upper right corner the non-polar surface is visible. The tightly packed layers to the left are the … Continue reading

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THEMIS: Dunes on the move in Aonia Terra

THEMIS Image of the Day, December 28, 2018. Located in the center of this VIS image is a group of sand dunes. With enough wind and sand, sand dunes are formed. Dune morphology typically has a shallow slope on the … Continue reading

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THEMIS: Tectonic chaos in Claritas Fossae

THEMIS Image of the Day, December 27, 2018. Located between the lava plains of Daedalia Planum and Solis Planum, Claritas Fossae is a graben-filled highland. Graben are formed by tectonic activity. In this region of Mars extensive and long lived … Continue reading

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THEMIS: Lava flow fronts in Daedalia Planum

THEMIS Image of the Day, December 26, 2018. Today’s VIS image shows a small portion of the immense lava flows that originated from Arsia Mons. Arsia Mons is the southernmost of the three large aligned volcanoes in the Tharsis region. … Continue reading

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THEMIS: Clouds over south polar cap layers

THEMIS Image of the Day, December 25, 2018. This line of clouds is located over the ice of the south polar cap. At the time of year when this VIS image was collected (southern hemisphere summer), clouds are a common … Continue reading

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THEMIS: Sand sheet in Halley Crater

THEMIS Image of the Day, December 24, 2018. This VIS image shows part of the dune field on the floor of Halley Crater. Rather than small individual sand dunes, the sand here is collected into a sand sheet and dune … Continue reading

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THEMIS: Her Desher Vallis in Noachis Terra

THEMIS Image of the Day, December 21, 2018. This VIS image shows a section of Her Desher Vallis. This channel is located in Noachis Terra. See more THEMIS Images of the Day by geological subject.

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THEMIS: On the edge of the south polar ice cap

THEMIS Image of the Day, December 20, 2018. At the bottom of this image is the layered edge of the south polar cap. There are more layers visible between the bright polar material and the dark sand dunes at the … Continue reading

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THEMIS: Faulting and collapse in Sirenum Fossae

THEMIS Image of the Day, December 19, 2018. The linear depressions in this VIS image are part of Sirenum Fossae. These depressions are called graben, which form by the down drop of material between two parallel faults. The faults are … Continue reading

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THEMIS: Clouds on a summer’s day

THEMIS Image of the Day, December 18, 2018. During southern summer, clouds are a common occurrence over the south polar cap. These dust clouds started as small dust devils visible near the top right corner of this VIS image. See … Continue reading

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