Japan Geoscience Union Meeting 2019

Presentation information

[J] Oral

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS08] Lunar science and exploration

Thu. May 30, 2019 10:45 AM - 12:15 PM 103 (1F)

convener:Hiroshi Nagaoka(Japan Aerospace Exploration Agency), Masahiro KAYAMA(Department of Earth and Planetary Material Sciences, Faculty of Science, Tohoku University), Masaki N Nishino(Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science), Tomokatsu Morota(Graduate School of Environmental Studies, Nagoya University), Chairperson:Ko Hashizume, Hiroshi Nagaoka

11:45 AM - 12:00 PM

[PPS08-11] Scientific approach for the promotion of lunar polar exploration mission

*Masahiro KAYAMA1, Ko Hashizume2, Hiroshi Nagaoka3, Kazuto Saiki4, Chihiro Yamanaka4, Makoto Hareyama5, Makiko Ohtake3 (1.Tohoku University, 2.Ibaraki University, 3.Japan Aerospace Exploration Agency, 4.Osaka University, 5.St. Marianna University School of Medicine)

Keywords:Lunar polar exploration mission, Lunar water, Infrared spectroscopy, Thermogravimetric analysis, Cavity ring-down spectroscopy, Neutron spectrometry

Remote sensing spacecraft missions (e.g., LCROSS and Deep Impact), lunar sample studies, and theoretical simulations suggest the existence of various water species (e.g., H2O ice, hydroxyl and molecular water, and aqueous phase) on the lunar surface and in the subsurface. Lunar water is thought to originate from solar wind, meteorite/asteroid/comet collisions, and/or volcanic eruptions and concentrated locally on the lunar surface to subsurface, especially permanently shadowed regions near the lunar poles. These findings indicate the possibility of the presence of available water resources for future human activity on the Moon. Moreover, lunar water is significant because it is closely related to a formation process of the lunar magma ocean and its differentiation to the mantle. Therefore, Lunar Polar Exploration Mission is planned to be launched in the 2020’s to survey lunar water. From the viewpoint of resources, science and engineering, this mission provides new insights into lunar evolutionary history and lunar base construction. Here, we will discuss analytical techniques for in-situ water analyses on the lunar poles and experiments simulating low-temperature and high-vacuum lunar environment.