Japan's MMX Mission: A Journey to Mars's Moon Phobos
BBC News reports on the upcoming MMX mission, set to launch on Monday, aiming to retrieve a sample from Mars' moon Phobos, a first for both Mars and its moons.
The spacecraft will embark on a journey to Mars's larger moon, Phobos, arriving in August 2027. Its primary goals are to unravel the mystery of Mars' moons' formation and to bring back the first-ever sample from Mars or its moons for detailed analysis on Earth.
Key Points:
- The Mars Moons Exploration (MMX) mission, led by the Japanese Space Agency (JAXA), is an ambitious endeavor.
- The spacecraft will study Mars' smaller moon, Deimos, upon arrival, before focusing on Phobos.
- Landing a rover on Phobos presents a significant challenge due to its small size and proximity to Mars, which exerts a strong gravitational pull.
- Once on Phobos, the MMX spacecraft will use a robotic arm to collect moon dust samples, packing them into a capsule for return to Earth in 2031.
- Only 10 grams of moon dust will be returned, but scientists expect this to be sufficient for in-depth analysis.
Scientific Aims:
The retrieved sample is expected to provide crucial clues regarding the origin of Mars' moons. Two competing theories exist:
- Impact Hypothesis: Phobos and Deimos were formed from debris resulting from a massive impactor striking Mars early in its history.
- Capture Hypothesis: The moons are asteroids from the outer solar system that were gravitationally trapped by Mars.
The chemical and mineral composition of the sample will help determine which theory is correct, offering a significant advancement in our understanding of Mars' history.