Mars’ Moon Phobos is Slowly Falling Apart

New modeling indicates that the grooves on Mars’ moon Phobos could be produced by tidal forces – the mutual gravitational pull of the planet and the moon. Initially, scientists had thought the grooves were created by the massive impact that made Stickney crater (lower right).

Credits: NASA/JPL-Caltech/University of Arizona

Read more: go.nasa.gov/1RLCS1v

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