This is a common misconception that a lot of people seem to have about Jupiter or any of the Gas Giants, that it's just a giant ball of fluffy gas. The way we tend to picture gases and atmosphere is the way it is on Earth -- airy and breathable. But gases can pile up and become bone crushingly heavy. And the more gases pile up, the more they will tend to ... (more) "Biggest" can be categorized into two -- largest (in diameter) or most massive (in mass).
The largest confirmed planet in size, as of March 2015, is the WASP 17b. The planet is almost twice the size of Jupiter, but only half the mass.
Sherlock is actually an English surname, which was used by Doyle as his character's first name. The name translates from Old English roots scir, meaning 'bright', and locc, meaning 'lock of hair'. There are other surnames from this group that derive from a person's hair color, like Blacklock (black hair), Silverlock (oh, John Slattery), Harlock (grey hair... (more)