Gravity is a theory. You are witnessing the speed of an Object, through air. Resistance is 9.8m/s^2. That proves NOTHING lol. Gravity is not proven by observing object density in air. This argument proves you have no idea about math, or science, or even the difference between an observation and a theory.

Think about it CERN exists. They can't prove GRAVITY? LOL. Also, how do airplanes keep track of earth curvature? What instrument?

Answer these simple questions to move on to phase 2.