The nature of celestial bodies the size of Mercury, or Pluto, both smaller than Earth, let alone Earth, and, in fact, even the smallest moon in our Solar System, Deimos, of Mars, is that they are spherical bodies, not disks; round in three dimensions, not a flat two. The physics of that nature were adequately proven by Newton, and ratified by every physicist since, grounded in Newtons three laws of motion, specifically, law #2: Force equals mass times acceleration [f = ma], also considered the force of gravity. I don't care what some idiot says on a video. I can make videos, too, one that would say Earth is a cube, or even a tesseract, but it would not have the imprimatur of truth.