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Upsilon Andromedae (υ Andromedae, abbreviated υ And) is a Sun-like star located approximately 44 light-years from Earth in the direction of the Andromeda constellation, accompanied by a multiplanet system orbiting it. In 1999, with the discovery of its second and third planets, it became a landmark in astronomical history as the first multiplanet system ever detected around a main-sequence star outside the Solar System. The system’s architecture consists of a “hot Jupiter” and two outer gas gian