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'''Gliese 581c''' is an extrasolar [[planet]] (or [[exoplanet]])orbiting the [[red dwarf star]] Gliese 581. It appears to be in the circumstellar habitable zone (or [[ecosphere]]), a notional spherical shell of [[space]] surrounding stars where the surface temperatures of any planets present might maintain liquid water.  Liquid water is vital because of its role as the solvent needed for biochemical reactions. As such, Gliese 581 c is one of the first truly "Earthlike" planets discovered outside of the [[Solar System]].  

'''Gliese 581c''' is an extrasolar [[planet]] (or [[exoplanet]])orbiting the [[red dwarf star]] Gliese 581. It appears to be in the circumstellar habitable zone (or [[ecosphere]]), a notional spherical shell of [[outer space|space]] surrounding stars where the surface temperatures of any planets present might maintain liquid water.  Liquid water is vital because of its role as the solvent needed for biochemical reactions. As such, Gliese 581 c is one of the first truly "Earthlike" planets discovered outside of the [[Solar System]].  

===Gliese 581c compared to [[Earth]]:===

===Gliese 581c compared to [[Earth]]:===