"Unveiling the Colossal Champion: The Universe's Largest Planet Revealed"

The largest known planet in the universe is the super-Jupiter Kappa Andromedae b, which has a mass around 12.8 times that of Jupiter. Planets can vary in size based on their width and mass, with some low-density gas giants being larger than higher-density exoplanets. The largest rocky planets, known as "super-Earths," are about twice the width of Earth. Planets become brown dwarfs once they reach a certain size and mass, with the dividing line between planets and brown dwarfs thought to be around 14 times the mass of Jupiter. The most massive brown dwarf discovered so far is 90 times more massive than Jupiter but has a smaller radius.