Habitable moons around extrasolar giant planets

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Possible planetary objects have now been discovered1-9 orbiting nine different main-sequence stars. These companion objects (some of which might actually be brown dwarfs) all have a mass at least half that of Jupiter, and are therefore unlikely to be hospitable to Earth-like life: jovian planets and brown dwarfs support neither a solid nor a liquid surface near which organisms might dwell. Here we argue that rocky moons orbiting these companions could be habitable if the planet-moon system orbits the parent star within the so-called 'habitable zone', where life-supporting liquid water could be present. The companions to the stars 16 Cygni B and 47 Ursae Majoris might satisfy this criterion. Such a moon would, however, need to be large enough (>0.12 Earth masses to retain a substantial and long-lived atmosphere, and would also need to possess a strong magnetic field in order to prevent its atmosphere from being sputtered away by the constant bombardment of energetic ions from the planer's magnetosphere.

Original languageEnglish (US)
Pages (from-to)234-236
Number of pages3
JournalNature
Volume385
Issue number6613
DOIs
StatePublished - Jan 16 1997

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Planets
Atmosphere
Orbit
Magnetic Fields
Ions
Water

All Science Journal Classification (ASJC) codes

  • General

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Williams, Darren M. ; Kasting, James F. ; Wade, Richard A. / Habitable moons around extrasolar giant planets. In: Nature. 1997 ; Vol. 385, No. 6613. pp. 234-236.
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Habitable moons around extrasolar giant planets. / Williams, Darren M.; Kasting, James F.; Wade, Richard A.

In: Nature, Vol. 385, No. 6613, 16.01.1997, p. 234-236.

Research output: Contribution to journalArticle

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AU - Wade, Richard A.

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