JAXA Launches First-Ever Phobos Sample Mission — SkimNews
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- JAXA is launching the world-first Martian Moons eXploration (MMX) mission on a new H3 rocket Tuesday to collect samples from Phobos, a 27km-wide moon orbiting 6,000km from Mars three times a day.
- Project manager Yasuhiro Kawakatsu said Phobos samples could provide data for using a Martian moon as a base for future manned Mars missions, calling the moons "the most important unclimbed mountains in the solar system."
- The MMX spacecraft is expected to reach the Mars region around August 2027, spend roughly three years gathering data and samples near Phobos, and return to Earth in 2031 carrying at least 10g of soil.
- A French-German rover called Idefix will land on Phobos around 2029 for a 100-day surface survey to help JAXA pick a flat, level site for the subsequent sampling touchdown.
- NASA contributed a sampling device that uses pressurised gas to lift surface dust into a container, while JAXA's coring method will collect material from about 2cm underground; ESA supplied the deep-space communications gear.
- Multiple Russian missions aimed at Phobos, including one launched in 2011, have failed, leaving the moons largely unstudied despite dozens of Mars missions since the 1960s.
Why it matters: This cements JAXA as the first agency to attempt a Phobos sample return, a target Russia has crashed into three times. Kawakatsu explicitly tied the science to planning future crewed Mars missions, meaning the 10g of soil returning in 2031 could directly shape where astronauts eventually land. The split of hardware — French-German rover, NASA sampler, ESA comms — turns it into a real test of smaller agencies anchoring flagship planetary science.
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