When you buy through links on our articles, Future and its syndication partners may earn a commission.Japan’s MMX sample-return mission to the Mars moon Phobos arrives at its Tanegashima launch site on March 31, 2026. Liftoff is expected in November or December of this year. | Credit: JAXAJapan’s Martian Moons eXploration (MMX) spacecraft has arrived at the Tanegashima spaceport ahead of launch, which will kick off an audacious mission to bag samples from Mars’ moon Phobos and deliver them to Earth.MMX recently completed its journey to the spaceport on Tanegashima island on March 31, the Japan Aerospace Exploration Agency (JAXA) announced recently on the social media platform X, and will now be prepared for a launch late this year.AdvertisementAdvertisementThe mission will launch on Japan’s flagship H3 rocket some time in November or December of this year, during a short optimal Mars launch window that opens once every 26 months.One sea voyage later, and the #MMX spacecraft arrived at the Tanegashima Space Center on March 31! Covering the trailer container is a sheet bearing our mission mark. We moved to the Spacecraft Test & Assembly Building 2 (STA2) and unpacked the next day. Onto launch site tests! pic.twitter.com/gdceGBt6wJ— @mmx_jaxa_en (April 6, 2026)Voir le tweet originalThe mission was earlier scheduled to launch in the previous launch window in 2024, but this was delayed due to issues with the H3 rocket. There had been doubt over the 2026 launch following the second failure of the H3 in seven tries in December 2025, but the issue was soon isolated as a payload fairing separation anomaly, clearing the way for MMX to proceed.If all goes according to plan, MMX will arrive in orbit around Mars in 2027 to begin mapping and analyzing Phobos and Deimos and search for a landing site. MMX will then land on Phobos in 2029 to collect around 0.35 ounces (10 grams) of samples. The spacecraft will then leave Mars in 2030 and deliver the precious samples to Earth in 2031 for scientists to study.The mission aims to determine if the two Martian moons, Phobos and Deimos, are captured asteroids or chunks of Mars sent into orbit by a massive impact, similar to how Earth’s moon formed about 4.5 billion years ago. MMX will also seek to provide …
