Planets of The Solar System: Tilts and Spins FriendsofNASA.org: How does your favorite planet spin? Does it spin rapidly around a nearly vertical axis, or horizontally, or backwards? This video animates NASA images of all eight planets in our Solar System to show them spinning side-by-side for an easy comparison. In the time-lapse video, a day on Earth—one Earth rotation—takes just a few seconds. Jupiter rotates the fastest, while Venus spins not only the slowest (can you see it?), but backwards