Gliese 581c
Planet or moon information

Chile, 2007

Orbital period

12.932 (± 0.007) days[1]


20.5 light years[2]

Revolves around

Gliese 581

Alien relevance

In the habitable zone

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Gliese 581c is a planet orbiting within the Gliese 581 system. It is classified as a super-Earth.[3] It was originally thought to be in the system’s habitable zone, until von Bloh‘s 2007 study.

von Bloh and Selsis studyEdit

The study of Gliese 581c by the von Bloh et al. team has concluded that "The super-Earth Gl 581c is clearly outside the habitable zone, since it is too close to the star."[4] The study by Selsis et al. also points out that when the red dwarf was a strong X-ray and EUV emitter, planet surface temperatures would range from 700 K to 1000 K (430 to 730 °C), like Venus today.[5]

See alsoEdit


  1. Extrasolar planet encyclopedia
  3. BBC News: New 'super-Earth' found in space
  4. von Bloh (2007). "The Habitability of Super-Earths in Gliese 581". Astronomy and Astrophysics 476 (3): 1365–1371. doi:10.1051/0004-6361:20077939. Bibcode2007A&A...476.1365V. 
  5. Selsis; Kasting, J. F.; Levrard, B.; Paillet, J.; Ribas, I.; Delfosse, X. (2007). "Habitable planets around the star Gl 581?". Astronomy and Astrophysics 476 (3): 1373–1387. doi:10.1051/0004-6361:20078091. Bibcode2007A&A...476.1373S. 
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