Is this frost on Mars?

Mars Reconnaissance Orbiter finds possible signs of frost
Mars Reconnaissance Orbiter finds possible signs of frost

In what is believed to be a first, the high resolution camera on-board the Mars Orbiter may have discovered frost on a non-polar region of the planet. While photographing a crater in the Northern Plains, it may have discovered a thin layer of bright frost on part of the crater’s wall. Since carbon dioxide is not stable under (Martian) summer conditions, this is likely a patch of water ice.

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