Tag Archives: south polar ice cap

HiRISE: The enduring charm of spiders

Araneiform terrain (colloquially: spider-like terrain) is located in the south polar region of Mars and evolves in appearance over the spring and summer. In the season shown here, the thin bright lines on the surface (the spider legs) are troughs … Continue reading

Posted in Reports | Tagged , , , , , , , | Leave a comment

HiRISE: Swiss cheese on a red planet

The Martian south polar cap is a layer of carbon dioxide ice, full of pits that make it look like Swiss cheese. The pits form when the Sun heats the ice and makes it sublimate (transform from a solid to … Continue reading

Posted in Reports | Tagged , , , , , , , | Leave a comment

HiRISE: The changing climate of Mars

A story of changes in the climate of Mars is told by icy deposits. Remnants of a formerly extensive deposit composed of dry ice layered together with dust and water ice form what is known as the south polar residual … Continue reading

Posted in Reports | Tagged , , , | Comments Off

THEMIS: South polar ice cap textures

THEMIS Image of the Day, November 12, 2018. This VIS image shows part of the south polar cap. This image was collected near the end of the southern spring season. See more THEMIS Images of the Day by geological subject.

Posted in Reports | Tagged , , , , , , , | Comments Off

HiRISE: Geyser season

Springtime in the South Polar region of Mars is a season of exciting activity. The thick coating of carbon dioxide ice that accumulated over the winter begins to sublimate (turn to vapor) as the sun rises higher in the sky … Continue reading

Posted in Reports | Tagged , , , , , , , , , | Comments Off

THEMIS: Swiss cheese and other ice cap textures

THEMIS Image of the Day, October 31, 2018. There are several different surface textures in the South Polar ice. The surface in this image with the round/semi round depressions is informally called Swiss cheese. See more THEMIS Images of the … Continue reading

Posted in Reports | Tagged , , , , , , , , , | Comments Off

HiRISE: We’ll always have the South Pole

We’ll always have the South Pole. While the global dust storm has obscured much of the surface, we’ve still been able to get some good images of the polar region. Can you also spot the example of pareidolia here? Beautiful … Continue reading

Posted in Reports | Tagged , , , , , , , | Comments Off

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

Posted in Reports | Tagged , , , , , , , , , , | Comments Off

HiRISE: Jamming with the ‘spiders’ from Mars

During winter at the South Pole of Mars, a carbon dioxide ice cap covers the region and as the sun returns in the spring, “spiders” begin to emerge from the landscape. But these aren’t actual spiders. We call it “araneiform … Continue reading

Posted in Reports | Tagged , , , , , , , | Comments Off

ExoMars TGO: South polar layered deposits

The ExoMars Trace Gas Orbiter captured this view of part of the south polar ice cap on Mars on 13 May 2018. The poles of Mars have huge ice caps that are similar to Earth’s polar caps in Greenland and … Continue reading

Posted in Reports | Tagged , , , , , , , , , | Comments Off