https://en.m.wikipedia.org/wiki/Flat_Earth

I think anyone who at least heard of newtonian or classical/mechanical physics, they should excuse flat earth crap that sun, black holes and entire galaxies evolves around the earth.

G m m /r^2

I think high school physics does gravity experiment on earth and object, and undergrad does gravity experiment against 2 small objects.

I beg those people please do not travel outside of US and embarrass us.