The planet orbiting Gliese 581 has a mass twice that of Earth.
Provided by ESO
April 21, 2009 Well-known exoplanet researcher Michel Mayor today announced the discovery of the lightest exoplanet found so far. The planet "e" in the famous system Gliese 581 is only about twice the mass of Earth. The team also refined the orbit of the planet Gliese 581 d, first discovered in 2007, placing it well within the habitable zone, where liquid water oceans could exist. These amazing discoveries are the outcome of more than 4 years of observations using the most successful low-mass-exoplanet hunter in the world, the High Accuracy Radial Velocity Planet Searcher (HARPS) spectrograph attached to the 3.6-meter European Southern Observatory (ESO) telescope at La Silla, Chile. Read More....
Provided by ESO
April 21, 2009 Well-known exoplanet researcher Michel Mayor today announced the discovery of the lightest exoplanet found so far. The planet "e" in the famous system Gliese 581 is only about twice the mass of Earth. The team also refined the orbit of the planet Gliese 581 d, first discovered in 2007, placing it well within the habitable zone, where liquid water oceans could exist. These amazing discoveries are the outcome of more than 4 years of observations using the most successful low-mass-exoplanet hunter in the world, the High Accuracy Radial Velocity Planet Searcher (HARPS) spectrograph attached to the 3.6-meter European Southern Observatory (ESO) telescope at La Silla, Chile. Read More....
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