These are the speeds at which the planets rotate on their axis. Venus has the slowest speed which, at the equator, is walking pace at 10.2 MPH, and in complete contrast Jupiter has the fastest speed, a whopping 28,150 MPH. Uranus is also very fast at 27,962 MPH. Saturn is at 22,058 MPH, and it is interesting to note that the Earth and Mars rotate at almost the same speed.
To see video of the rotating Solar System just click on the link below. Has sound. Full screen option bottom right.