Japan Geoscience Union Meeting 2015

Presentation information

International Session (Oral)

Symbol B (Biogeosciences) » B-AO Astrobiology & the Origin of Life

[B-AO01] Astrobiology: Origins, Evolution, Distribution of Life

Wed. May 27, 2015 4:15 PM - 6:03 PM 105 (1F)

Convener:*Kensei Kobayashi(Department of Chemistry and Biotechnology, Faculty of Engineering, Yokohama National University), Akihiko Yamagishi(Tokyo University of Pharmacy and Life Science, Department of Molecular Biology), Masatoshi Ohishi(Astronomy Data Center, National Astronomical Observatory of Japan), Eiichi Tajika(Department of Complexity Science and Engineering, Graduate School of Frontier Sciences, The University of Tokyo), Takeshi Kakegawa(Graduate School of Science, Tohoku University), Shigeru Ida(Department of Earth and Planetary Science, Graduate School of Science and Technology, Tokyo Institute of Technology), Chair:Takeshi Kakegawa(Graduate School of Science, Tohoku University), Shigeru Ida(Department of Earth and Planetary Science, Graduate School of Science and Technology, Tokyo Institute of Technology)

4:45 PM - 5:15 PM

[BAO01-05] The First Report of the Tanpopo Mission after Its Arrival to the International Space Station

*Yuko KAWAGUCHI1, Hajime YANO1, Hirofumi HASHIMOTO1, Shin-ichi YOKOBORI2, Eiichi IMAI3, Hajime MITA4, Hideyuko KAWAI5, Hikaru YABUTA6, Kaori TOMITA-YOKOTANI7, Kazumichi NAKAGAWA8, Kensei KOBAYASHI9, Kyoko OKUDAIRA10, Makoto TABATA5, Masumi HIGASHIDE1, Hironobu HAYASHI11, Satishi SASAKI12, Yoko KEBUKAWA9, Yukihiko ISHIBASHI13, Akihiko YAMAGISHI2 (1.ISAS/JAXA, 2.Sch. Life Sci., Tokyo Univ., Pharm., Life Sci., 3.Nagaoka Univ., of Tech.,, 4.Fukuoka Inst., of Tech.,, 5.Chiba Univ.,, 6.Osaka Univ.,, 7.Univ., of Tukuba,, 8.Kobe Univ.,, 9.Yokohama Natl. Univ.,, 10.Univ., Aizu, 11.Tokyo Univ., Tech.,, 12.Tokyo Insti., Tech.,, 13.Kyusyu Univ.,)

To investigate the panspermia hypothesis and chemical evolution, The Tanpopo mission has been developed as Japan’s first astrobiology-drivenl space experiments since 2007 (Yamagishi et al., 2009). This “Tanpopo” mission is launched this spring and it will be likely to start its first-year exposure on the ExHAM pallet onboard the Kibo Exposed Facility of International Space Station (ISS) by the time conference will be held.
The Tanpopo mission is composed of two main experimental apparatus: capture panels and exposure panels. Both will be prepared inside the Kibo module and exposed via airlock with its robot arm up to the maximum of 4 years. The capture panels are to intact capture micrometeoroids, space debris and possible terrestrial aerosols uplifted to the ISS orbit by the world’s lowest density silica aerogels exposed to space. If the Tanpopo succeeds to capture terrestrial microbes embedded in the aerosol particles in the aerogel capture panels, it will push the upper limit of existing altitude for terrestrial microbes from the current record of 77 km to 400 km from the ground.
We also test both the survivability of some terrestrial microbes and the chemical alteration of astronomical analog organic compounds in the near Earth space environment. For the former, we emphasize on the importance of cell-aggregates, whose concept is known as “masapansperimia” (Kawaguchi et al., 2013), as the ark for interplanetary transfer of microbes
It is planned that the first samples of both panels will be retrieved back to the Earth in mid-2016, for post-flight analysis initially at ISAS and then at laboratories nationwide by the Tanpopo Team members.

Yamagishi et al., 2009, Trans. JSASS Space Tech. Japan, 7, ists26 (2009), pp. Tk 49-55.
Kawaguchi et al., 2013, Origins of Life and Evolution in Biospheres, 43, 411?428.