Phobos starting to crack under pressure

Martian moon’s grooves are early signs of a long, slow crumble into oblivion

Phobos

GROOVY MOON  Grooves etched across Mars’ moon Phobos, seen in this 2004 picture from the Mars Express orbiter, are caused by a mix of stress fractures and impact debris, new studies suggest.

ESA, DLR, FU Berlin (CC BY-SA IGO 3.0)

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