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The cometary contribution to prebiotic chemistry.

J Oró1, T Mills, A Lazcano

  • 1Department of Biochemical and Biophysical Sciences, The University of Houston, TX 77204, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1992
PubMed
Summary
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Early Earth likely received essential volatiles and organic molecules from comets. While collisions destroyed some complex organics, simpler molecules may have survived, aiding the formation of life

Area of Science:

  • Astrobiology
  • Planetary Science
  • Geochemistry

Background:

  • Early Earth's volatile inventory is crucial for understanding abiogenesis.
  • Comets and primitive bodies are considered potential sources of Earth's volatiles and organic compounds.

Purpose of the Study:

  • To investigate the role of cometary impacts in delivering volatiles and organic molecules to the early Earth.
  • To assess the survival and potential for prebiotic chemistry following cometary collisions.

Main Methods:

  • Analysis of dynamical considerations and lunar cratering rates.
  • Examination of Solar System chemical abundances.
  • Evaluation of the single-impact theory for Earth-Moon system origin.

Main Results:

Keywords:
NASA Discipline ExobiologyNASA Discipline Number 52-20NASA Program ExobiologyNon-NASA Center

Related Experiment Videos

  • Cometary impacts during the early Archean likely supplied significant volatiles to Earth.
  • High-temperature collisions may have destroyed complex organic molecules but allowed simpler carbon species to survive.
  • Post-collisional atmospheric chemistry under anoxic conditions could lead to the formation of biogenic elements.

Conclusions:

  • Comets were a major source of volatiles and potentially prebiotic organic molecules for early Earth.
  • Survival of simpler molecules and subsequent atmospheric reactions could have facilitated the origin of life.