everyone is making the same obvious mistakes so i'll address you all.
1. there are no flat surfaces on a sphere, the end. why is sizing it up going to make any kind of difference, they're just not there.
2. saying science is testable is nothing more than a lie. there is more than high school science out there and there is no way to test half the bs claimed. you just need to use your head and you will see that. nasa lie and have been caught out on lies, science makes up new things all the time. once Newton described motion then it was Einstein which somehow turned gravity into bendy space, and now everything quantum is taking over and everything is just waves rather than matter and you expect to take any of that seriously? science lies, the conspiracy exists. denying nasa's lies is self-deception.
3. universal acceleration is a fact even for a round earther, everything accelerates away from the center of the universe and the site of the big bang. push dust along and it will form a flat surface. if it hands in the air, and you punch it, it wraps around the force that hits it. when that force is constant it results in a flat surface. you can't act like there's suddenly no force for spheres to coalesce, it doesn't work like that.