The Mars system revealed by the Martian Moons eXploration mission
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Published:2022-01-03
Issue:1
Volume:74
Page:
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ISSN:1880-5981
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Container-title:Earth, Planets and Space
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language:en
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Short-container-title:Earth Planets Space
Author:
Ogohara KazunoriORCID, Nakagawa Hiromu, Aoki Shohei, Kouyama Toru, Usui Tomohiro, Terada Naoki, Imamura Takeshi, Montmessin Franck, Brain David, Doressoundiram Alain, Gautier Thomas, Hara Takuya, Harada Yuki, Ikeda Hitoshi, Koike Mizuho, Leblanc François, Ramirez Ramses, Sawyer Eric, Seki Kanako, Spiga Aymeric, Vandaele Ann Carine, Yokota Shoichiro, Barucci Antonella, Kameda Shingo
Abstract
AbstractJapan Aerospace Exploration Agency (JAXA) plans a Phobos sample return mission (MMX: Martian Moons eXploration). In this study, we review the related works on the past climate of Mars, its evolution, and the present climate and weather to describe the scientific goals and strategies of the MMX mission regarding the evolution of the Martian surface environment. The MMX spacecraft will retrieve and return a sample of Phobos regolith back to Earth in 2029. Mars ejecta are expected to be accumulated on the surface of Phobos without being much shocked. Samples from Phobos probably contain all types of Martian rock from sedimentary to igneous covering all geological eras if ejecta from Mars could be accumulated on the Phobos surface. Therefore, the history of the surface environment of Mars can be restored by analyzing the returned samples. Remote sensing of the Martian atmosphere and monitoring ions escaping to space while the spacecraft is orbiting Mars in the equatorial orbit are also planned. The camera with multi-wavelength filters and the infrared spectrometer onboard the spacecraft can monitor rapid transport processes of water vapor, dust, ice clouds, and other species, which could not be traced by the previous satellites on the sun-synchronous polar orbit. Such time-resolved pictures of the atmospheric phenomena should be an important clue to understand both the processes of water exchange between the surface/underground reservoirs and the atmosphere and the drivers of efficient material transport to the upper atmosphere. The mass spectrometer with unprecedented mass resolution can observe ions escaping to space and monitor the atmospheric escape which has made the past Mars to evolve towards the cold and dry surface environment we know today. Together with the above two instruments, it can potentially reveal what kinds of atmospheric events can transport tracers (e.g., H2O) upward and enhance the atmospheric escape.
Graphical Abstract
Funder
Japan Society for the Promotion of Science the Earth-Life Science Institute (ELSI) and the National Institutes of Natural Sciences: Astrobiology Center
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Geology
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