Tag Archives: north polar ice cap

THEMIS: Polar cap layers at Ultima Lingula

THEMIS Image of the Day, February 4, 2019. Today’s VIS image is located along the margin of Ultima Lingula, where the polar cap meets the surrounding plains. The feature in the center of the image is a chasma where the … Continue reading

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HiRISE: The source of dunes in Chasma Boreale

The source of dunes in Chasma Boreale. This image shows dunes during the summer, when they were free from the seasonal layer of carbon dioxide ice that covers the region for much of the year. These dunes, which are near … Continue reading

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European Space Agency: Supporting InSight

At just before 9pm Central European Time on 26 November, Mars will receive a new visitor: NASA’s InSight lander. (…) Since InSight’s study is focused on sensing the planet’s interior, surface geology is not such an important factor in deciding … Continue reading

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HiRISE: Dune swarm!

Dune swarm!  These dunes mean business here in Chasma Boreale. Beautiful Mars series. [More at links]

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Mars CO2 ice cap throughout the martian year

This animation shows a side-by-side comparison of CO2 ice at the north (left) and south (right) Martian poles over the course of a typical year (two Earth years). This simulation isn’t based on photos; instead, the data used to create … Continue reading

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Mars Express: From horizon to horizon

Fifteen years ago, ESA’s Mars Express was launched to investigate the Red Planet. To mark this milestone comes a striking view of Mars from horizon to horizon, showcasing one of the most intriguing parts of the martian surface. On 2 … Continue reading

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THEMIS: Polar layers

THEMIS Image of the Day, May 28, 2018. This VIS image shows part of the margin of the north polar cap and the surrounding plains. The layering of the ice is easily visible due to the dust that is deposited … Continue reading

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THEMIS: Polar dunes and layers of ice and dust

THEMIS Image of the Day, May 24, 2018. This VIS image shows the margin between the polar cap and the surrounding plains. There are dunes on the plains at the top of the image. In the upper left corner it … Continue reading

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THEMIS: Polar winds streaming off the ice cap

THEMIS Image of the Day, April 5, 2018. This VIS image shows ‘streamers’ of clouds created by katabatic winds at the north polar cap. Katabatic winds are created by cold air sinking at the pole and then speeding along the … Continue reading

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HiRISE: Defrosting dunes within Chasma Boreale

This image shows a dune field in Chasma Boreale, which is a large trough that cuts into the North Polar ice cap. Some of the dunes in this image are quite long and sinuous with a slight bulge at one … Continue reading

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