I'll start with this question, how much "mass" does something have to have before centrifugal force exceeds gravity on earth? I used basic physics of centrifugal force and gravity, used force vectors, and the math doesn't jive. This is what I mean. There are 2 forces on earth that everything experiences if the earth rotates about its axis and orbits around the sun. Gravity and centrifugal force are quantified algebraically by acceleration (unit of distance)/(unit of time)^2 and thus they interact as force vectors. When you look at the values for objects with a mass of 4250kg or more, you will see the centrifugal acceleration begins to exceed the acceleration of gravity. I used these figures [when calculating centrifugal acceleration]: Earth's orbit values: Velocity 29,722ms−1 Radius 149,668,992,000m Mass ≥22,679.6kg Earth's rotation values: Velocity 464.922ms−1 @ the equator (this value decreases down to zero as it approaches and reaches the "poles") Radius 6,371,390m Mass ≥4,250kg Moon orbit values: Velocity 1023.1ms−1 Radius 384,400,000m Mass 7.34767309×10^22kg With these values and their products in mind, notice that the force vectors begin to exceed gravity and counter any claim that the earth is spinning or that the moon could orbit the earth. Is this right? Value I used for constant of gravity is 143 N Any value that exceeds 143 N from the centrifugal equation, is force away from earth exceeding gravity towards earth.