Gliese 581: Perbedaan antara revisi

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* {{cite web|url=http://www.space.com/scienceastronomy/070424_hab_exoplanet.html |title=SPACE.com - Major Discovery: New Planet Could Harbor Water and Life |publisher=Space.com |date= |accessdate=2008-10-20}}
* {{cite web|url=http://www.solstation.com/stars/gl581.htm |title=Gliese 581 / HO Librae |publisher=Solstation.com |date= |accessdate=2008-10-20}}
* {{cite web |url=http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20070424/new_planet_070424/20070424?hub=SciTech |title=CTV.ca | Earth-like planet found that may support life |publisher=Ctv.ca |date=Updated Wed. April 25 2007 11:05 AM ET |accessdate=2008-10-20 |archive-date=2007-10-23 |archive-url=https://web.archive.org/web/20071023075235/http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20070424/new_planet_070424/20070424?hub=SciTech |dead-url=yes }}
* [http://exoplanet.eu/star.php?st=Gl+581 '''Extrasolar Planets Encyclopaedia''': Gl 581]
* [http://www.satsig.net/seticalc.htm Do your own simulation of radio communications to or from Gliese 581]