Jupiter is not perfectly spherical, but rather an oblate spheroid. This means it's slightly flattened at its poles and bulging at its equator due to its rapid rotation.

Here's why:

* Rotation: Jupiter spins incredibly fast, completing a rotation in just under 10 hours.

* Centrifugal Force: This rapid rotation creates a centrifugal force that pushes outward on the planet's equator, causing it to bulge.

* Gravity: Jupiter's strong gravity pulls inward, but the centrifugal force counteracts this at the equator, resulting in the oblate shape.

While Jupiter's overall shape is oblate, there are also smaller variations in its shape due to the influence of its massive moons and internal structure.