NASA / JPL-CALTECH / UNIV. OF ARIZONA / SCIENCE PHOTO LIBRARY NASA / JPL-CALTECH / UNIV. OF ARIZONA / SCIENCE PHOTO LIBRARY
Hellas Crater, Mars. Satellite image of the Hellas crater on Mars, showing evidence of past glaciation. Hellas Crater contains some of the clearest evidence on Mars for glacial processes. This image shows roughly north-south running ridges and troughs which mark the deposition of sediment called moraine underneath or beside a glacier. There are also sinuous channels which may have formed from meltwater underneath a glacier. Imaged by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter (MRO) satellite.
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