Japan launches historic MMX sample-return mission to Mars' moon Phobos (video)

space.com Oct 19, 2026

Japan launches historic MMX sample-return mission to Mars’ moon Phobos (video)

Curated by Shubham · TechCapsules · Oct 19, 2026

AI-summarised brief · reviewed before publication

Japan’s Martian Moons eXploration (MMX) mission lifted off from Tanegashima on Oct. 19 aboard a JAXA‑Mitsubishi H3 rocket, beginning a ten‑month trek to Mars. The 63‑metre launch vehicle performed a flawless ascent, shedding boosters, fairings and executing a trans‑Mars injection burn that placed MMX on a 24,145 mph trajectory toward the Red Planet. Scheduled to arrive in August 2027, the spacecraft will enter a quasi‑satellite orbit around Phobos, conduct a three‑year campaign that includes two landings on the 22‑km moon, sample collection, and a rover deployment by French‑German partners. After a brief Phobos return, MMX will fly by Deimos before departing for Earth in November 2030, with a return capsule slated to touch down in Australia in 2031.

💡 Why It Matters

· Retrieving Phobos material could finally resolve the long‑standing debate over whether Mars’ moons formed from an impact or were captured asteroids, offering a rare glimpse into early solar‑system processes.

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💡 The mission will deliver pristine Martian‑moon material to Earth, offering a unique window into the early solar system and the origin of Phobos and Deimos.