New modeling indicates that the grooves on Mars moon Phobos could be produced by tidal forcesthe mutual gravitational pull of the planet and the moon. Initially, scientists had thought the grooves were created by the massive impact that made Stickney cr
Credit: NASA/JPL-Caltech/University of Arizona
The long, shallow grooves lining the surface of Phobos are likely early signs of the structural failure that will ultimately destroy this moon of Mars.
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