Tag Archives: spiders

HiRISE: Spider terrain

Spider terrain. Beautiful Mars series.

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HiRISE: Immature spider terrain

Immature spider terrain — Completely in need of adult supervision, obviously. Beautiful Mars series.

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HiRISE: How gas carves channels

A layer of dry ice covers the South Polar layered deposits every winter. In the spring, gas created from heating of the dry ice escapes through ruptures in the overlying seasonal ice, entraining material from the ground below. The gas … Continue reading

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HiRISE: Wide, branching channels

Southern spring on Mars brings sublimation of the seasonal dry ice polar cap. Gas trapped under the seasonal ice sheet carves channels on its way to escaping to the atmosphere. At this site, the channels are wider than we see … Continue reading

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HiRISE: Spiders on mounds

This terrain looks like lumpy sediment on top of patterned ground. The lumpy sediment is likely just loosely consolidated because it is covered with spidery channels. This landform is uniquely Martian, formed in the spring as seasonal dry ice turns … 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: Painting with frost

Subtle variations in color look like brush strokes as the lightly frosted terrain reflects light. These variations provide a backdrop to some exotic features referred to colloquially as “spiders.” The radial channels branching out from a central depression are formed … Continue reading

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Hunting ice cap ‘spiders’ through citizen science

Ten thousand volunteers viewing images of Martian south polar regions have helped identify targets for closer inspection, yielding new insights about seasonal slabs of frozen carbon dioxide and erosional features known as “spiders.” From the comfort of home, the volunteers … Continue reading

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HiRISE: Spiders

Not so itsy, not so bitsy: “Spider formations” are made by the process of sublimation, when a solid (carbon dioxide ice) transforms directly into a gas. Beautiful Mars series.

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HiRISE: On the evolution of spiders

On the evolution of spiders. “Spider” is the informal name we give to these features, which are caused by sublimation, when a solid transforms directly into a gas. Here, it’s carbon dioxide gas that sublimates and creates these patterns. Beautiful … Continue reading

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