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Comets in other planetary systems?

C F Chyba1

  • 1Laboratory for Extraterrestrial Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|March 1, 1995
PubMed
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Comets may have delivered essential volatiles and organic molecules to early Earth, potentially seeding life. Evidence suggests comet-like bodies may also exist around other stars, like Beta Pictoris.

Area of Science:

  • Exoplanetary science
  • Astrobiology
  • Solar system dynamics

Background:

  • Comets are crucial for transporting volatiles and organic molecules from the outer to the inner solar system.
  • Liquid water, essential for life as we know it, requires warm temperatures found only in the inner solar system.
  • The existence of comets in other planetary systems is key to understanding the potential for extraterrestrial life.

Purpose of the Study:

  • To investigate the exobiological implications of comets.
  • To determine if comet-like bodies exist in other planetary systems.

Main Methods:

  • Review of existing literature on cometary roles in the solar system.
  • Analysis of spectroscopic data for evidence of exocometary bodies.

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Main Results:

  • Comets may have been vital for delivering biogenic volatiles and organic molecules to the early inner solar system.
  • Previous attempts to detect exocomets have largely failed.
  • Growing spectroscopic evidence suggests comet-like bodies orbit the star Beta Pictoris.

Conclusions:

  • The existence of comets in other planetary systems is an important exobiological question.
  • Beta Pictoris shows promising signs of hosting comet-like bodies, warranting further investigation.