Japan launches mission to collect samples from Mars’s moon
The MMX spacecraft has begun a five-year mission to collect samples from Phobos and aims to return material to Earth in 2031.
Follow-up to: Japan prepares Mars-moon mission before planned launch Sunday, 18 October 2026, 18:01
Japan has launched a spacecraft towards Phobos, one of Mars’s two moons, in a mission designed to collect samples and bring them back to Earth. The launch marks a new stage in a project involving space agencies from Japan, the United States and Europe.
The Martian Moons eXploration spacecraft lifted off from the Tanegashima Space Center on 19 October at 21:41 Central European Summer Time, according to the German Aerospace Center. It travelled aboard Japan’s H3 rocket, with officials later confirming that the spacecraft had separated from the rocket’s upper stage as planned.
The launch is the latest development in an expedition previously described as being in preparation. According to DLR, MMX is led by Japan’s space agency, JAXA, and carries contributions from NASA, the European Space Agency, France’s CNES and Germany’s DLR. The mission is intended to study both Phobos and Deimos, although the sample collection will focus on Phobos.
The spacecraft is expected to reach Mars in 2027. A small rover named Idefix, developed jointly by DLR and CNES, is planned to land on Phobos around the turn of 2028 and 2029. The rover will examine the surface and help prepare for the main spacecraft’s sampling operations.
If the mission proceeds as planned, MMX will collect dust, soil and rock from Phobos and return them to Earth in 2031. No spacecraft has previously collected samples from either Phobos or Deimos, and no samples from Mars or its moons have yet reached Earth.
Scientists hope the mission will help answer questions about how Mars’s moons formed. Their origin remains disputed: they may be captured asteroids, or they may have formed from material ejected after a large impact on Mars. The mission’s observations and samples could provide evidence for testing those explanations.
The project is part of a wider international effort to retrieve material from the Martian system. China is also planning a Mars sample-return mission, while the United States is considering how to bring back samples already collected by the Perseverance rover. Those projects are separate from MMX and have different scientific objectives.
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Fact-check Approved · Priya Shah — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The central event, launch time and mission objectives are supported by both an independent news agency and a participating space agency. No unsupported breakthrough claim is made.
- confirmed MMX launched on an H3 rocket from Tanegashima on 19 October 2026. — Confirmed by DLR and AP. source
- confirmed The mission aims to return Phobos samples in 2031. — Reported by AP and DLR. source
- confirmed No samples have previously been returned from Mars or its moons. — Reported by AP. source
Editor's note
The launch and planned mission timetable are confirmed by AP and DLR. The scientific explanations about the moons’ origins remain research questions rather than settled conclusions.Sources
- Japan launches spacecraft to explore Martian moons and bring home soil — Associated Press
- MMX mission successfully launches – Idefix rover on its way to Martian moon Phobos — German Aerospace Center
The story so far
- Sunday, 18 October 2026, 18:01 Japan prepares Mars-moon mission before planned launch
- Tuesday, 20 October 2026, 07:02 Japan launches mission to collect samples from Mars’s moon (this article)
More on this in other media
- iNews — „mmx phobos”
- BBC News — „mmx phobos”
- The Guardian — „mmx phobos”