science

Martian Moons eXploration

Martian Moons eXploration is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Martian Moons eXploration rather than just read about it. In short: Martian Moons eXploration (MMX) is a robotic space probe set for launch in 2026 to bring back the first samples from Mars' largest moon Phobos. Developed by the Japan Aerospace Exploration Agency (JAXA) and announced on 9 June 2015, MMX will land and collect samples from Phobos once or twice, along with conducting Deimos flyby observations and monitoring Mars's climate.

Key takeaways

Martian Moons eXploration belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Martian Moons eXploration to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Martian Moons eXploration from memory before moving on to harder problems.

Reference excerpt

Martian Moons eXploration (MMX) is a robotic space probe set for launch in 2026 to bring back the first samples from Mars' largest moon Phobos. Developed by the Japan Aerospace Exploration Agency (JAXA) and announced on 9 June 2015, MMX will land and collect samples from Phobos once or twice, along with conducting Deimos flyby observations and monitoring Mars's climate. The mission aims to provide key information to help determine whether the Martian moons are captured asteroids or the result of a larger body hitting Mars. JAXA and other Japanese government officials officially approved the MMX project to proceed into development on 19 February 2020. The probe arrived at Japan's Tanegashima Space Center on March 31, 2026, and it is expected to launch towards Mars in October 20, 2026 during the year's launch window.

Overview

The spacecraft will enter orbit around Mars before transferring to Phobos, where it will land once or twice and collect regolith samples using a pneumatic sampling system. The mission is designed to return at least 10 grams (0.35 oz) of material from the moon's surface. After departing Phobos, the spacecraft will conduct several flybys of Deimos before releasing a return capsule for Earth, with sample return planned for 2031. The spacecraft has a total launch mass of approximately 4,000 kilograms (8,800 lb), including about 1,900 kilograms (4,200 lb) of propellant. The spacecraft consists of three major elements: a 1,800-kilogram (4,000 lb) propulsion module, a 150-kilogram (330 lb) exploration module, and a 1,050-kilogram (2,310 lb) return module. Because Phobos and Deimos have insufficient mass to support conventional satellite orbits, MMX will operate in quasi-satellite orbits (QSOs), a class of trajectories that can remain stable for extended periods while staying in close proximity to the moons. The mission is led by Yasuhiro Kawakatsu.

International collaboration MMX is led by JAXA, with participation from NASA, France's CNES, Germany's DLR, and the European Space Agency (ESA), who are providing scientific instruments. NASA will contribute a neutron and gamma-ray spectrometer called MEGANE (an acronym for Mars-moon Exploration with GAmma rays and NEutrons, which also means "eyeglasses" in Japanese). CNES will provide the Near IR Spectrometer (NIRS4/MacrOmega). CNES is also contributing expertise in flight dynamics to plan the mission's orbiting and landing manoeuvres. Development and testing of key components, including the sampler, is ongoing. As of December 2023, MMX is scheduled to be launched in 2026, and will return to Earth five years later in 2031. ESA will provide deep space communication equipment: a transponder and power amplifier, and will provide ground station support from the Estrack network. The sample-return capsule will land in Australia.

Spacecraft instruments MMX will have seven scientific instruments:

TENGOO – TElescopic Nadir imager for GeOmOrphology, a narrow field camera for detailed terrain study OROCHI – Optical RadiOmeter composed of CHromatic Imagers, a wide field visible light camera LIDAR – Light Detection and Ranging, uses a laser to reflect light from the moon's surface, to study surface altitude and albedo MIRS – MMX InfraRed Spectrometer, a near-infrared observation device for characterizing the minerals that make up the moons of Mars. Developed in partnership with CNES, France MEGANE – (MEGANE means "eyeglasses" in Japanese) Mars-moon Exploration with GAmma rays and NEutrons, a gamma-ray and neutron spectrometer developed by NASA, Johns Hopkins Applied Physics Laboratory, and Lawrence Livermore National Laboratory CMDM – Circum-Martian Dust Monitor, a dust counting device for characterizing the environment around the Martian moons MSA – Mass Spectrum Analyzer, an instrument to study the ion environment around Mars JAXA will partner with the Japan Broadcasting Corporation (NHK) to develop the "Super Hi-Vision Camera" which combines a 4K and 8K camera, making it the first time that Mars will be imaged in 8K resolution. Images will be regularly transmitted back to Earth with flight data, in order to recreate MMX exploration around Mars and its moons. The original image data will be stored in a recording device in MMX's return capsule and brought back to Earth as part of the sample-return portion of the mission. The Gravity GradioMeter (GGM), Laser-Induced Breakdown Spectroscope (LIBS), Mission Survival Module (MSM) were proposed as additional instruments.

Idefix rover

Following a study by the French CNES space agency, it was decided that the spacecraft will deliver a small rover provided by CNES and the German Aerospace Center (DLR). IDEFIX is a rover weighing less than 30 kg, and is named after Idéfix, the French name for Dogmatix, Obelix's dog in the French comic Asterix. The name Idefix (without acute accent) is also used for the character in the German translation. Besides its native France the Asterix series has been particularly successful in Germany — out of 350 million comic books sold worldwide by 2013, 130 million were in the French original while 120 million were in German. It will be equipped with cameras, a radiometer, and a Raman spectrometer for in-situ surface exploration. The instruments are: two navigation cameras (NavCams), two cameras (WheelCams) "that will observe the interactions of the back and front wheels with the regolith", a Raman spectrometer (RAX) and a miniaturized radiometer (miniRad). Its objectives are to touch the surface of Phobos, to check the behaviour of the surface under mechanical actions and to relay this information to Earth. It must also demonstrate that it is possible to use wheeled locomotion on a body with such low gravity. Finally, it will take measurements in situ, observing the ground of Phobos at a resolution of 100 μm, and moving around on it.

Sampling

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Martian Moons eXploration

Start with the simplest possible case. Write down what Martian Moons eXploration claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Martian Moons eXploration before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Martian Moons eXploration ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Martian Moons eXploration

In research: Martian Moons eXploration appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Martian Moons eXploration in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Martian Moons eXploration is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2026 in Japan, 2026 in spaceflight, Japanese space probes, so understanding it makes those chapters shorter.
In everyday life: Look for Martian Moons eXploration outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Martian Moons eXploration in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Martian Moons eXploration means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Martian Moons eXploration out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Martian Moons eXploration in simple terms?

Why does Martian Moons eXploration matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Martian Moons eXploration?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Martian Moons eXploration.