"Astronomers Discover 'Cold Saturn' with Unusually Long Year"

NASA's TESS has discovered two giant planets, TOI-4600 b and c, orbiting a star 700 light-years away, with the outer planet having the longest year of 483 days and being among the coldest exoplanets found so far. These planets could provide valuable insights into the formation and evolution of large, gaseous planets, filling a gap in knowledge between gas giants like Jupiter and "hot Jupiters." While space telescopes have been able to measure some atmospheric components of hot and warm Jupiters, TOI-4600 b and c offer the rarer prospect of revealing atmospheric ingredients of "temperate" gas giants.