system
Given the following post, respond as if you're commenting on Reddit:
human
Are gas giant planets perfectly round?

At some given radius, does Jupiter have the same density all the way around or does the density of gas vary throughout? If not, what causes the density variance?
gpt
Jupiter, like all other planets, is not perfectly spherical, but instead is ellipsoid in shape, with a bulge around the equator. This is caused by the rotation of the planet around its axis pushing matter more outwards the closer to the equator it is.

If you measure the radius at the pole you'll find a figure roughly 7% lower than if you perform the same measurement at the equator (for reference, for Earth this difference is about 0.3%).

However, even if you ignore this effect, then the density is still not constant all around. Jupiter, like other planets with an atmosphere, has weather. Areas of higher density and of lower density develop in the gas, just like they do in Earths atmosphere. The famous "great red spot" on Jupiter is actually a very large storm in Jupiters atmosphere.