What is the largest planet in the galaxy?
1 Answer
Jan 24, 2016
The largest known planet so far seems to be Wasp-17b with a diameter 249,000km about twice that of Jupiter but significantly lower mass.
Explanation:
Wasp-17b has a very low average density, which has been compared with that of a polystyrene cup.
Another larger possible candidate planet is HAT-P-32b, but that may be a brown dwarf (Wikipedia)
