Origin and Evolution of Life on Terrestrial Planets

A. Brack, G. Horneck, C. S. Cockell, A. Berces, N. K. Belisheva, Carlos Eiroa, Thomas Henning, Tom Herbst, Lisa Kaltenegger, Alain Leger, Rene Liseau, Helmut Lammer, Franck Selsis, Charles Beichman, William Danchi, Malcolm Fridlund, Jonathan Lunine, Francesco Paresce, Alan Penny, Andreas QuirrenbachHuub Rottgering, Jean Schneider, Daphne Stam, Giovanna Tinetti, Glenn J. White, Charles Cockell

Research output: Contribution to journalArticlepeer-review

Abstract

The ultimate goal of terrestrial planet-finding missions is not only to discover terrestrial exoplanets inside the habitable zone (HZ) of their host stars but also to address the major question as to whether life may have evolved on a habitable Earth-like exoplanet outside our Solar System. We note that the chemical evolution that finally led to the origin of life on Earth must be studied if we hope to understand the principles of how life might evolve on other terrestrial planets in the Universe. This is not just an anthropocentric point of view: the basic ingredients of terrestrial life, that is, reduced carbon-based molecules and liquid H2O, have very specific properties. We discuss the origin of life from the chemical evolution of its precursors to the earliest life-forms and the biological implications of the stellar radiation and energetic particle environments. Likewise, the study of the biological evolution that has generated the various life-forms on Earth provides clues toward the understanding of the interconnectedness of life with its environment.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalInternational Journal of Astrobiology
Volume10
Issue number1
DOIs
Publication statusPublished - 2010

Keywords

  • Organic molecules
  • Origin of life
  • Astrobiology
  • Radiation
  • EARTH-LIKE PLANETS
  • GALACTIC HABITABLE ZONE
  • AMINO-ACIDS
  • ULTRAVIOLET-RADIATION
  • HYDROTHERMAL VENTS
  • BACTERIA
  • STARS
  • PERMAFROST
  • BIOSPHERE
  • SEDIMENTS

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