Which planet rotates so fast that its day is only 10 hours long?

Asked by: Lindsey

Answer

Both Jupiter and Saturn have days that last about 10 hours. Jupiter has a period of 0.410 earth days or about 9.84 hours and Saturn has a period of 0.426 earth days or about 10.224 hours.
Answered by: Mike Perkins, Physics/Astronomy Major, Penn State