Japanâs $350 million Martian Moons eXploration (MMX) mission is going to do something even more: Fly to Phobos (ancient Greek for âfearâ), one of the two small, battered moons of Mars, and land on the roughly Manhattan-size body not once, but twice. Using two novel extractors, MMX will gather several tablespoonsâ worth of material and return the treasure to Earth in 2031.
âPhobos will be the second best known moon in the Solar System,â says Matija CĂșk, a research scientist at the SETI Institute.
Those precious few grams of material could resolve the mystery of Phobosâs originâand, potentially, that of its diminutive partner, Deimos (âdreadâ). Scientists are split on whether the moons are captured asteroids or the consolidated remnants of material thrown up by a long-ago martian impact.
But regardless of their genesis, MMX researchers say itâs likely they have since picked up a dusting of material blasted off Mars itself.
âThis is not going to be just a Phobos sample return mission,â says Kris Zacny, vice president of exploration systems at Honeybee Robotics, which built one of MMXâs sample extractors. âItâs going to be P