Gliese 581c
Astronomical discovery
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Gliese 581c is an exoplanet orbiting within the Gliese 581 system. It is the second planet discovered in the system and the third in order from the star. With a mass at least 5.5 times that of the Earth, it is classified as a super-Earth. Wikipedia
Orbital period: 13 days
Orbits: Gliese 581
Discovered: April 4, 2007
Discoverers: Michel Mayor and Stéphane Udry
Distance to Earth: 20.42 light years
Detection method: Radial velocity
Mass: ≥5.652+0.386; −0.239 M🜨