The most oblate planet is Jupiter. Being large, rotating rapidly, and being kind of squishy[1]... it's about 6% wider than it is tall, which is around 9,000 ki

The most oblate planet is Jupiter. Being large, rotating rapidly, and being kind of squishy[1]... it's about 6% wider than it is tall, which is around 9,000 kilometers. Enough to be noticeable to the eye. [1] Ok, squishiness doesn't really factor into it.