[B-CG08] [EE] From Deep Sea to Deep Space: the Solar System Ocean World Exploration to Search for Life

Tue. May 23, 2017 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall HALL7)

convener:Hajime Yano(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency), Christophe Sotin(Jet Propulsion Laboratory), Ken Takai(Extremobiosphere Research Center, Japan Agency for Marine-Earth Science & Technology)

Since 2000's, deep space exploration missions such as the Galileo to the Jovian system and the Cassini/Huygens to the Saturn system have demonstrated that several icy satellites (e.g., Europa, Ganymede, Callisto, Titan, and Enceladus) have a deep global ocean below their icy crust. Among them, Europa and Enceladus are likely to have liquid water in contact with a rocky core, an interface very similar to the terrestrial, deep sea-floor where life was discovered about 50 years ago. 'Ocean worlds' within our Solar System hold the greatest potential in humanity's search for extant life, as well as a second abiogenesis (independent origin of life) beyond the Earth. Comparative oceanography of conditions on the Earth, Europa, Enceladus, Titan, and elsewhere will likely also spark new discoveries and insights that inform our search for Earth-like worlds among the rapidly growing list of exoplanets. To achieve this goal that will game-change astrobiology research, interdisciplinary collaborations among astronomy, planetary science, oceanography, geophysics, chemistry and biology are must and such efforts have been started in Japan, the United States, and Europe since early 2010's. This session thus welcomes papers describing the diversity of terrestrial seafloor fluid flows, the diversity of biological populations, the technologies involved in the exploration of the terrestrial sea-floor, physical, chemical and potentially biological conditions in deep oceans of the icy satellites, key instrument developments for habitability investigation and biomarker and life detections on the Earth and other 'ocean worlds' in the Solar System, lessons learned from the terrestrial deep sea exploration to deep space exploration including planetary protection issues, and prospects for the Solar System ocean world exploration missions in the coming decades.

[BCG08-P01] Microorganisms involved in the formation of distinctive iron oxide in deep-sea environments of Earth and even in extraterrestrial bodies

*Hiroko Makita^1,2, Sakiko Kikuchi¹, Satoshi Mitsunobu³, Emiko Tanaka^2,1, Yoshihiro Takaki¹, Toshiro Yamanaka⁴, Tomohiro Toki⁵, Takuroh Noguchi⁶, Kentaro Nakamura⁷, Mariko Abe¹, Miho Hirai¹, Masahiro Yamamoto¹, Katsuyuki Uematsu⁸, Junichi Miyazaki¹, Takuro Nunoura¹, Yoshio Takahashi⁷, Ken Takai¹ (1.Japan Agency for Marine-Earth Science and Technology, 2.Kanagawa Institute of Technology, 3.Ehime University, 4.Tokyo University of Marine Science and Technology, 5.University of the Ryukyus, 6.Kochi University, 7.The University of Tokyo, 8.Marine Works Japan Ltd)

[BCG08-P02] Simulated Enceladus fly-through experiment using aerogel and peptides

*Fujishima Kosuke^1,2, Sota Numaho^3,5,4, Wataru Takahagi^4,2,3, Takazo Shibuya⁴, Masaru Tomita^5,3, Ken Takai⁴, Yoshinori Takano⁴, Hajime Yano⁶ (1.Tokyo Institute of Technology, Earth-Life Science Institute, 2.Graduate School of Media and Governance, Keio University, 3.Institute for Advanced Biosciences, Keio University, 4.Japan Agency for Marine-Earth Science and Technology, 5.Department of Environment and Information Studies, Keio University, 6.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)

[BCG08-P03] Analytical Assessment of Intact Capture Capability for Possible Biological Sigantures within Icy Plume Particles by Using Hydrophilic and Hydrophobic Aerogels

*Sota Numaho^1,2,3, Yoshinori Takano², Wataru Takahagi^2,3,4, Kosuke Fujisima^6,3, Masaru Tomita³, Ken Takai^2,6, Hajime Yano^2,5 (1.Department of Environment and Information Studies, Keio University, Fujisawa, Japan, 2. Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan , 3. Institute for Advanced Biosciences, Keio University, Tsuruoka, Japan , 4.Graduate School of Media and Governance, Keio University, Fujisawa, Japan, 5. Institute for Space and Astronautical Science, Japan Aerospace eXploration Agency, Sagamihara, Japan, 6. Earth-Life Science Institute, Tokyo Institute of Technology, Ookayama, Japan)