Tag Archives: CO2 ice

Martian winters are shaping the landscape

Researchers based millions of kilometres from Mars have unveiled new evidence for how contemporary features are formed on the Red Planet. Their innovative lab-based experiments on carbon dioxide (CO2) sublimation – the process by which a substance changes from a … Continue reading

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HiRISE: Squiggles in Hellas Planitia

At around 2,200 kilometers in diameter, Hellas Planitia is the largest visible impact basin in the Solar System, and hosts the lowest elevations on Mars’ surface as well as a variety of landscapes. This image covers a small central portion … Continue reading

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HiRISE: A world of snowy dunes

It is spring in the Northern hemisphere when we took this image. Over the winter, snow and ice have inexorably covered the dunes. Unlike on Earth, this snow and ice is carbon dioxide, better known to us as dry ice. … Continue reading

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HiRISE: Spider terrain

Spider terrain. Beautiful Mars series.

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THEMIS: South polar textures as local summer ends

THEMIS Image of the Day, June 8, 2017. This VIS image of the south pole was taken at the end of summer. Frost will soon start to form as the season transitions into fall. Fall in the southern hemisphere means … Continue reading

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HiRISE: Lace on Mars

Some seasonal ice on Mars is transparent so that the sunlight penetrates to the bottom of the ice. Heat from this sunlight can turn the ice directly into a gas in a process called sublimation and this gas can scour … Continue reading

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Small troughs may grow from gas-jet ‘spiders’

Erosion-carved troughs that grow and branch during multiple Martian years may be infant versions of larger features known as Martian “spiders,” which are radially patterned channels found only in the south polar region of Mars. Researchers using NASA’s Mars Reconnaissance … Continue reading

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HiRISE: Fans on crater rims

Gas under pressure will choose an easy escape route. In this image, the terrain is covered with a seasonal layer of dry ice. The weak spots, for gas sublimating from the bottom of the seasonal ice layer to escape, appear … Continue reading

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HiRISE: Coolest landscape on Mars or Earth

Many Martian landscapes contain features that are familiar to ones we find on Earth, like river valleys, cliffs, glaciers and volcanos. However, Mars has an exotic side too, with landscapes that are alien to Earthlings. This image shows one of … Continue reading

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HiRISE: Seasonal monitoring of ‘Inca City’

Seasonal monitoring of region dubbed “Inca City.” Beautiful Mars series.

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