How Is Planet Earth Proportionately Round and Smooth Like a Billiard Ball and What Is an Ellipsoid?
On average, the earth is certainly as smooth as a billiard ball. The earth is more than 12,000 kilometers in diameter. Mount Everest is less than 10 kilometers high, and the profoundest depths of the ocean are around 11 kilometers. Thus, the most extreme variations in the earth’s surface are roughly on a scale of one part in a t
