Below you can find the This largest planet spins the most rapidly; its day is just 10 hours long Jeopardy Words Answer. The answer to This largest planet spins the most rapidly; its day is just 10 hours long has 7 letters. This clue belongs to the The planets category and is part of Jeopardy Word Level 2041. If you scroll near the bottom you will find other clues and answers part of level 2041