Studies on microorganisms in space: a contribution to the discussion on panspermia, search for life on Mars and interaction of life with its environment

Details Studies on microorganisms in space: a contribution to the discussion on panspermia, search for life on Mars and interaction of life with its environment Studies on microorganisms in space: a contribution to the discussion on panspermia, search for life on Mars and interaction of life with its environment

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.496..105h&link_type=abstract

In: Exo-/astro-biology. Proceedings of the First European Workshop, 21 - 23 May 2001, ESRIN, Frascati, Italy. Eds.: P. Ehrenfreu

Biology

Exobiology, Space Missions, Mars: Life, Organic Molecules

Scientific paper

Space environment is a unique tool to test the interactions of life with environmental extremes: (1) ability of microorganisms to cope with the complex interplay of all space parameters during a hypothetical interplanetary journey and potential protection mechanisms; (2) sensitivity of biologically effective environmental UV radiation to ozone; (3) survival strategies of microorganisms in response to a simulated Martian UV radiation climate. In experiments in Earth orbit, it was found that radiation-resistant microbes could survive a journey from one planet to another in our solar system, if they are shielded against cosmic radiation by meteorite material, and that the ozone layer protects the biosphere by reducing the biologically effective UV dose by three orders of magnitude. Future experiments on the EXPOSE facility of the ISS will contribute to a better understanding of the processes regulating the interactions of life with its environment.

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