In a stellar step forward for planetary science, Japan successfully launched a spacecraft on October 19th, headed for the mysterious moons of Mars. The mission aims to collect soil samples and bring them back to Earth for the first time in history.
The Martian Moons eXploration mission, known as MMX, lifted off from Tanegashima Space Center aboard Japan's H3 rocket at 3:41 p.m. EDT (4:41 a.m. local time the next day).
Led by the Japan Aerospace Exploration Agency (JAXA), this five-year, $578 million international effort brings together partners from NASA, France's CNES, Germany's DLR, and the European Space Agency in a shared quest to unlock secrets of our solar system.
The roughly 5-ton spacecraft is expected to arrive at Mars by late summer 2027, where it will closely study the planet's two small, potato-shaped moons—Phobos (about 14 miles or 22 km across) and the even smaller Deimos. Then it will attempt something never done before: landing on Phobos to gather samples of its surface.
Scientists are eager to understand how these curious moons formed. Were they created from debris after a giant impact

