Summary

We may be on the verge of solving the mystery of the Martian moons. On 20 October, the Martian Moons eXploration (MMX) spacecraft launches towards the larger of the two moons, Phobos , with the goal of bringing back a sample that may finally explain how Phobos and its sibling, Deimos, formed. MMX will launch from Tanegashima Space Center in Japan.

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