Jupiter Spins So Fast It Bulges

A day on Jupiter lasts less than 10 hours, the fastest rotation of any planet in the Solar System. That spin is so extreme that Jupiter bulges outward at the equator.

Jupiter’s Wild Spin

It Is Not Quite a Sphere

Jupiter’s equatorial radius is about 7% larger than its polar radius. In other words, the planet looks slightly squashed, like a ball pressed from the top and bottom.

Jupiter’s Wild Spin