Japan's MMX Spacecraft Begins Sample-Return Voyage to Phobos
Japan launched its Martian Moons eXploration mission on October 20, 2026, aboard an H3 rocket. The spacecraft will arrive at Mars in August 2027, deploy the German-French lander Idefix, and later collect at least 10 grams of material from Phobos. The sample is expected to return to Earth in 2031.
MMX lifted off from Tanegashima Space Center at 04:41:03 JST on 20 October 2026 and separated from its H3 rocket 17 minutes later. The craft is scheduled to enter Mars orbit in August 2027, then move to Phobos about a month afterward.
The German-French Idefix lander will be released from 40–100 meters above Phobos; the moon’s low gravity should let it survive and self-right. In 2030 the main spacecraft aims to gather at least 10 grams, visit Deimos, and send a capsule to South Australia in 2031.
If MMX succeeds, it could give planetary scientists a first direct sample from the Mars system, potentially reshaping debates about the moons’ origins. Space agencies and engineering teams may gain lessons for low-gravity sampling and international lander collaboration. The public could see renewed interest in Mars science, while Australian retrieval teams and local authorities may handle capsule recovery. Any benefits would depend on mission success and later research, not immediate everyday effects.