JAXA Launches MMX Mission to Return Phobos Sample — SkimNews
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- JAXA launched the Mars Moons Exploration (MMX) spacecraft from Japan, targeting Phobos to grab moondust and bring it to Earth — the first sample-return attempt from Mars or its moons
- The spacecraft is scheduled to arrive at Phobos in August 2027 and return just 10 grams of material to the Woomera desert in South Australia by 2031
- Scientists hope the sample resolves whether Phobos and Deimos formed from a giant impact on Mars or are captured asteroids from the outer Solar System, with mineral composition expected to settle the debate immediately
- MMX will deploy a small rover on Phobos — the first rover ever landed on such a small, low-gravity moon — to scout a landing site before the main spacecraft touches down
- Phobos samples may also contain grains of Mars itself implanted by impacts on the Martian surface, offering direct information about the Red Planet's composition and history
- NASA's Mars Sample Return mission, which would have retrieved Perseverance's cached samples, has been effectively cancelled after US Congress halted its funding; China is planning its own Martian sampling mission for 2028
Why it matters: With NASA's Mars Sample Return effectively killed by Congress and China's effort not launching until 2028, JAXA's MMX becomes the only active mission attempting to return pristine Martian material — and the 10 grams it brings home could settle the Phobos formation debate and deliver uncontaminated Mars grains researchers have chased for decades.
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