The Earth may seem to look like a sphere from space, but it actually has a large buldge near the equator! The Earth is actually a irregularly shaped ellipsoid. That buldge near the equator makes the shape of the Earth irregular. The Earth’s shape is constantly changing due to tides and the movement of tectonic plates. So, how do we describe Earth’s true shape? Well, it is an irregular changing ellipsoid!! That is why Earth is not a perfect sphere!