Oct 18, 2026
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The Japan Aerospace Exploration Agency is preparing to launch a spacecraft to collect soil samples from the Martian moon Phobos in a mission expected to last five years.

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ManyPress Editorial

2 min readSource:Guardian Science, Phys.org, ABC News Technology
Japan to Launch World's First Mission to Retrieve Samples from Martian Moon Phobos

Key facts

  • •The mission is led by JAXA with equipment and communications support from NASA and other international agencies.
  • •Phobos orbits Mars at a distance of approximately 6,000 kilometers and completes three orbits per day.
  • •Previous attempts by other nations, including multiple Russian missions, to land on Phobos have failed.
  • •Phobos is an irregular, crater-pocked body measuring roughly 20 to 30 kilometers in diameter.
  • •The mission is expected to take five years to complete.

The Japan Aerospace Exploration Agency (JAXA) is scheduled to launch a spacecraft on Tuesday using an H3 rocket for the world's first mission to retrieve samples from Phobos. This international effort, which includes support from NASA, aims to investigate the origins of the Martian moons and potentially provide insights into the solar system's history. The mission is expected to span five years and could offer critical data for future human exploration of Mars.

By the numbers

0.1%
estimated Martian material in Phobos samples
6,000 km
orbital distance of Phobos from Mars

Scientific Goals and Moon Origins

Researchers hope the mission will resolve long-standing questions regarding the formation of Phobos and its sibling moon, Deimos. Theories suggest the moons may be remnants of debris from a large impact on Mars or captured asteroids. By analyzing soil samples, scientists believe they can determine the moons' composition and origins, which may also provide clues about the development of life in the solar system.

Strategic Importance for Mars Exploration

Project manager Yasuhiro Kawakatsu described the Martian moons as the most important unclimbed mountains in the solar system. Data gathered from Phobos is expected to help scientists evaluate the feasibility of using a Martian moon as a base for future crewed missions to Mars. JAXA officials estimate that approximately 0.1% of the collected material may originate from Mars itself, potentially offering a unique record of the planet's history.

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This article was independently rewritten by ManyPress editorial AI from reporting originally published by Guardian Science, Phys.org, ABC News Technology.

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