Just stop. You feel acceleration, not velocity. That's why you don't feel movement when in a cruising airplane. Same with the movement of the universe. Gravity is the weakest force and is affected by mass, so Earth's gravity can be overcome by a magnet or airfoil. This isn't new. GPS only works on a sphere. The equations are open source. You can build a receiver and prove that you're watching from a sphere, even collect the data simultaneously from multiple sites around the planet. Earth had a thicker atmosphere early in its life that contributed to higher CO2 levels and gigantic fossils found in museums.