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segunda-feira, abril 30, 2007

Bem vindo Gliese 581 c

Gliese 581 c (IPA: [ˈgliːzə]) is a "super-earth" extrasolar planet orbiting the red dwarf star Gliese 581.[3] It appears to be in the habitable zone of space surrounding the star, where the surface temperatures of any planets present might maintain liquid water[3][4] and therefore be suitable for life as we know it. The planet is astronomically close, at 20.5 light years (~194 trillion km or ~120 trillion miles) from Earth in the direction of the constellation of Libra.[2] Its star is identified as Gliese 581 by its number in the Gliese Catalogue of Nearby Stars, and with respect to Earth, is the 87th closest star system.[5]

Gliese 581 c may be the first extrasolar planet discovered with a surface temperature similar to Earth's. It is the smallest extrasolar planet around a main sequence star discovered to date.[3]

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