Enhanced-color image of Stickney Crater, the largest crater on Mars' moon Phobos, taken by the HiRISE camera on the Mars Reconnaissance Orbiter. The image showcases Stickney's immense size relative to Phobos, revealing surface streaks from material sliding down crater walls, and bluish regions potentially indicating a freshly exposed surface. Mysterious grooves are also visible across the moon's surface.
Astronomy Picture from 10/04/2008
Stickney Crater
Source: https://apod.nasa.gov/apod/ap080410.html
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