The Planetary System in Gliese 581
April 25, 2007
Artist's impression of the planetary system around the red dwarf Gliese 581. Using the instrument HARPS on the ESO 3.6-m telescope, astronomers have uncovered 3 planets, all of relative low-mass: 5, 8 and 15 Earth masses. The five Earth-mass planet (seen in foreground - Gliese 581 c) makes a full orbit around the star in 13 days, the other two in 5 (the blue, Neptunian-like planet - Gliese 581 b) and 84 days (the most remote one, Gliese 581 d).
Topics: Environment, Libra constellation, Terrestrial planets, Extrasolar planets, artist, Gliese 581 b, Gliese 581, Gliese 581 c, Super-Earths, Gliese 581 d, High Accuracy Radial Velocity Planet Searcher, Planetary systems, European Southern Observatory, Planet