HiRISE shares a long-term monitoring image of polar dunes showing frost and dark sublimation spots, reinforcing that Mars change-detection is an ongoing, repeat-imaging program rather than one-off snapshots.
HiPOD: Dunes with Fans
We acquired this image as a site for long term monitoring for any changes.
On some of the ridges, frost is visible as well as dark spots caused by the process of sublimation.
This finding is one of many signals tracked across Space. The live feed updates every few hours with new expert voices, debates, and emerging ideas.
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