Upsilon Andromedae planetary system

Numéro d’image : 11606047
Upsilon Andromedae planetary system
Upsilon Andromedae planetary system. Computer artwork of three extrasolar planets orbiting the star Upsilon Andromedae. This Sun-like star is 54 light years from Earth in the constellation Andromeda. The first planet,Upsilon Andromedae b was found in June 1996. Its presence was inferred by observing the star's wobble as it moved through space,caused by the gravitational pull of the planet. U. Andromedae b has a mass 230 times that of Earth,and orbits its Sun in 4.6 days at a distance of about 8 million kilometres. U. Andromedae c and d were both discovered in April 1999,and orbit in 242 and 1270 days respectively
Licence : Droits gérés
Crédit: Science Photo Library / Van Ravenswaay, Detlev
Taille de l’image : 5079 px × 3454 px
Model Release : Non requis
Restrictions : -

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