what is the biggest planet?
Answer (1)
However, if considering all known planets, including exoplanets, the title of "biggest" becomes more complex. There are several candidates for the largest exoplanet, with sizes often inferred from indirect observations. One of the largest known is ROXs 42Bb, a gas giant with a radius about 2.5 times that of Jupiter. However, there's uncertainty due to different measurement methods and the ongoing debate about what constitutes a planet versus a brown dwarf (a sub-stellar object). Some protoplanets (planets still forming) may even be larger .
