Japan Launches spacecraft to the largest Moon of Mars Phobos

The Japan Aerospace Exploration Agency (JAXA) in collaboration with four other space agencies including NASA launched MMX mission to the largest Moon of Mars Phobos to collect 10 grams of soil sample.

News Source: https://mainichi.jp/english/

Japan's historic Martian Moons Exploration (MMX) mission to gather rock and soil samples from Phobos, the moon of Mars, was successfully launched. On Monday, October 19, 2026, at 4:41 AM, the unmanned spacecraft, driven by the flagship H3 rocket, launched into the night sky from the Tanegashima Space Center in southwest Japan. The $578 million space project represents a significant advancement in space exploration. The project is a huge international partnership comprising five space organizations, including NASA and the European Space Agency, and is overseen by the Japan Aerospace Exploration Agency (JAXA).

The MMX spacecraft has a lengthy trip ahead of it. August 2027 is when it is expected to enter Mars' orbit. When it arrives, the spacecraft will launch Idefix, a small, four-wheeled French-German rover. The rover will really bounce across the surface of Phobos for several minutes before coming to a stop because the planet's gravity is only 1/1,000th that of Earth. To locate a secure landing area for the main craft, Idefix will scout the rocky surface for 100 days. After landing, the main stationary lander will drill and vacuum up at least 10 grams of moon soil for a short two hours. Before departing Mars' orbit in late 2030 and returning to Earth in 2031, the spacecraft will also visit Deimos, the planet's smaller moon.

With the help of these rare samples from the Martian moon, scientists aim to unravel a long-standing cosmic mystery: How were Phobos and Deimos formed?

Solving this mystery will provide vital information on the formation of our solar system and the evolution of livable, life-supporting planets.

The multinational space competition to return the first samples from the Martian system is greatly accelerated by this launch. After a congressional decision in January 2026, the Trump administration just suspended NASA's own Mars Sample Return program, which depends on the Perseverance rover. Other nations have a significant window of opportunity during this gap. China is working quickly with its Tianwen-3 mission, while Japan hopes to return from Phobos in 2031. China plans to launch in 2028 with the goal of returning rock samples straight from Mar’s surface to Earth by 2031, possibly surpassing Japan's schedule and altering the balance of power in space.

FAQs:

Q: What is the goal of Japan's MMX mission?

A: Japan's historic Martian Moons Exploration (MMX) mission to gather rock and soil samples from Phobos.

Q: When did the launch happen and when will it return of Japan's MMX mission?

A: On Monday, October 19, 2026, at 4:41 AM Japan’s MMX mission launched and it will enter Mar’s Orbit in August 2027. The Spacecraft will return back to Earth by 2031.

Q: What is the "Idefix" rover and how will it work?

A: The French and German space agencies have created Idefix, a small, four-wheeled rover that will be launched onto Phobos. After being dropped, the rover will bounce around for a few minutes due to Phobos’s incredibly weak gravity (1/1,000th of Earth's). In order to test the surface and locate a secure location for the main Japanese lander to land, it will drive about for 100 days.

Q: How much soil sample will the Japan’s MMX mission will collect?

A: After landing, the main stationary lander will drill and vacuum up at least 10 grams of moon dirt for a short two hours.

Q: What scientific mystery Japan’s MMX mission could solve?

A: With the help of these rare samples from the Martian moon, scientists aim to unravel a long-standing cosmic mystery: How were Phobos and Deimos formed? Solving this mystery will provide vital information on the formation of our solar system and the evolution of livable, life-supporting planets.