Exo-Astrobiological Aspects of Europa and Titan: From Observations to Speculations |
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Authors: | FranÇois Raulin |
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Institution: | (1) Observatoire de Paris and Université Pierre et Marie Curie, Meudon, F-92195, France;(2) Laboratoire Interuniversitaire des Systèmes Atmosphériques, LISA-UMR CNRS 7583, Universités Paris 7 et Paris 12, 61 Avenue du Général de Gaulle, F-94000 Créteil, France |
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Abstract: | By extrapolating what we know on the origins of life on Earth, and in particular on the chemical processes which gave rise
to the first living system, Europa and Titan appear as two major targets for studies of exo/astrobiology in the outer solar
system. With the likely presence of water oceans relatively close to its surface, coupled to possible sources of organics,
the emergence and sustaining of life on Europa seems possible. On Titan, it cannot be ruled out. But the main exobiological
interest of the largest satellite of Saturn is the presence of a complex organic chemistry which shows many similarities with
the prebiotic chemistry which allowed the emergence of life on Earth. |
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Keywords: | Europa Titan exobiology astrobiology organic chemistry prebiotic chemistry biological signatures life |
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