Drag or air resistance is a force acting opposite to the relative motion of an object with respect to a surrounding fluid. The magnitude of drag is directly proportional to the fluid’s density.
Flat-Earthers claim that because satellites lack an aerodynamic shape, they cannot be faster than airplanes. In reality, the air density at such an altitude is minuscule and will not produce a significant drag. Thus, they do not need an aerodynamic shape.