Tag Archives: ice

HiRISE: Icy erosion

This image shows an interesting collection of kilometer-scale craters with flat and smooth floors. The craters themselves may be the result of secondary impacts, craters caused by debris from a distant larger impact. Since then, the surface has been significantly … Continue reading

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THEMIS: Mamers Valles

THEMIS Image of the Say, December 24, 2015. This VIS image shows a portion of Mamers Valles. Mamers Valles is a large and complex channel system on the northern margin of Arabia Terra. More THEMIS Images of the Day by … Continue reading

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HiRISE: Coming and going of ice

Like Earth’s water table, Mars has an ice table. Sometimes, the ice table coincides with the ground’s surface as it does here. The knobby, pitted terrain is caused when ice is deposited and then sublimates over and over again. This … Continue reading

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THEMIS: Tenuis Cavus

THEMIS Image of the Day, December 10, 2015. Tenuis Cavus is a region within the north polar cap where the underlying surface is visible. Ice comprises the top part of the image. Craters and sand dunes are visible on the … Continue reading

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THEMIS: Southern dunes – false color

THEMIS Image of the Day, December 2, 2015. The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations … Continue reading

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THEMIS: Frosty crater

THEMIS Image of the Day, November 26, 2015. This unnamed crater contains a small dune field in the central part of its floor. This image was collected in northern spring and the dunes are still frost covered. As the season … Continue reading

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THEMIS: Granicus Valles

THEMIS Image of the Day, November 23, 2015. Today’s VIS image shows a portion of Granicus Valles. This channel system is located west of Elysium Mons and likely was created by both lava and water flow related to the Elysium … Continue reading

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THEMIS: Channels

THEMIS Image of the Day, November 20, 2015. Today’s VIS image shows a number of unnamed channels located on the northeastern margin of Terra Sabaea. More THEMIS Images of the Day by geological topic.

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THEMIS: Olympia Rupes

THEMIS Image of the Day, November 18, 2015. The steep feature in this VIS image is the margin of the north polar cap, called Olympia Rupes. (Rupes means scarp.) The layering of the polar cap is visible in this image. … Continue reading

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THEMIS: Tyndall Crater – false color

THEMIS Image of the Day, October 30, 2015. The THEMIS VIS camera contains 5 filters. The data from different filters can be combined in multiple ways to create a false color image. These false color images may reveal subtle variations … Continue reading

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