Japan launching bold sample-return mission to Mars moon Phobos today: Watch it live

space.com Oct 19, 2026

Japan launching bold sample-return mission to Mars moon Phobos today: Watch it live

Curated by Shubham · TechCapsules · Oct 19, 2026

AI-summarised brief · reviewed before publication

Japan’s space agency JAXA is set to launch the Martian Moons eXploration (MMX) mission today, Oct. 19, at 3:41 p.m. EDT aboard an H3 rocket from Tanegashima. The spacecraft will travel to Mars, arrive in August 2027, and enter orbit around Phobos a month later. Over the next 18 months it will survey Phobos and Deimos before deploying the ESA‑led Idefix rover on Phobos in early 2029 to assess landing conditions and surface composition. The mothership will attempt a controlled touchdown in 2030, collect at least 10 g of regolith, and return the sample to Earth in 2031. NASA contributes a scientific instrument, communications support and funding for U.S. researchers, while the mission builds on Japan’s Hayabusa sample‑return heritage and international collaboration.

💡 Why It Matters

· Returning Phobos material could finally settle the moons’ origin, shedding light on how water and organic compounds were delivered to the inner planets.

Capsules Space

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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.