A piece of Mars's moon: Why Japan has sent a mission to Phobos, Pg15

Key Highlights:

• The Japan Aerospace Exploration Agency (JAXA) is undertaking the Martian Moons Exploration (MMX) mission, targeting Mars's moon Phobos.
• The mission aims to retrieve at least 10 grams of physical samples from Phobos and return them to Earth by 2031.
• MMX is scheduled for launch in October 2026, with the spacecraft expected to reach Mars around August 2027.
• The mission seeks to study the origin of Mars's moons, Phobos and Deimos, and assess Phobos's potential as a staging point for future crewed missions to Mars.
• It involves international collaboration with agencies like NASA, European Space Agency (ESA), CNES (France), DLR (Germany), and the Australian Space Agency.

Jaxa Mission.jpg

Detailed Insights:

• The MMX mission will be the first to collect samples from a moon of Mars and return them to Earth, building on Japan's expertise in sample-return missions.
• Scientists are particularly interested in Phobos and Deimos due to two main theories regarding their origin: they are either captured asteroids or formed from debris after a large impact on Mars.
• The spacecraft will enter a quasi-satellite orbit around Phobos to conduct detailed observations of its topography and chemical composition before selecting a landing spot.
• A key component of the mission is the IDEFIX rover, developed jointly by CNES and DLR, which will be deployed on Phobos by the main craft.
• The mission will test advanced technologies for future deep-space exploration, including autonomous navigation and landing in extremely weak gravity environments.
• Phobos's weak gravity makes it an attractive potential staging point for crewed Mars missions, as landing and taking off would require significantly less fuel than from Mars itself.
• The mission's timing coincides with a period where major space powers are advancing planetary exploration capabilities, positioning Japan as a leader in this field.
• In contrast, the NASA-ESA Mars Sample Return program, which aimed to bring samples from Mars itself, was effectively halted due to budgetary constraints and technical challenges.

Scientific/Technical Concepts Involved:

• Phobos and Deimos: The two small, irregularly shaped natural satellites orbiting Mars.
• Quasi-satellite orbit: An orbit where an object appears to orbit a planet but is primarily gravitationally bound to the Sun, with the planet's gravity influencing its path.
• Sample-return mission: A space mission designed to collect samples from a celestial body and bring them back to Earth for detailed analysis.