Artist's impression of the newly discovered planetary system Gliese 581

After more than four years of observations using the most successful low-mass exoplanet hunter in the world, the HARPS spectrograph attached to the 3.6-metre ESO telescope at La Silla, Chile, astronomers have discovered in this system the lightest exoplanet found so far: Gliese 581e (foreground) is only about twice the mass of our Earth. The Gliese 581 planetary system now has four known planets, with masses of about 1.9 (planet e, left in the foreground), 16 (planet b, nearest to the star), 5 (planet c, centre), and 7 Earth-masses (planet d, with the bluish colour). The planet furthest out, Gliese 581d, orbits its host star in 66.8 days, while Gliese 581 e completes its orbit in 3.15 days.

Herkunftsnachweis:

ESO/L. Calçada

Über das Bild

ID:eso0915a
Typ:Illustration
Veröffentlichungsdatum:21. April 2009
Dazugehörige Veröffentlichungen:eso0915
Größe:15000 x 9375 px

Über das Objekt

Name:Gliese 581
Typ:Milky Way : Star : Circumstellar Material : Planetary System
Entfernung:20 Lichtjahre
Kategorie:Exoplanets
Illustrations

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Siehe auch