MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Upsilon Andromedae was one of the first star systems - a binary star - found to host an extrasolar planet. That was in January 1997. Now, a total of four planets are known there, ranging from 0.6 to 3.8 times the mass of Jupiter. This artwork depicts the view from the surface of a hypothetical satellite, orbiting one of the innermost worlds.
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