This is an interesting and thought provoking topic .... (that some people still believe the earth to be flat and that a formula exists that actually computes the curvature of the planet).
BaSS said that "Earth supposedly curves at approx 8 inch per mile which is 4 feet in 6 mile not 16". (See page 1)
Does anyone know how to find the formula that is used t o compute this measurement?
Or is there anyone smart enough on the Board to figure out the formula himself?
I would assume that that same formula must be used by NASA prior to any planned landing on any extraterrestrial body.
And YES, gravity does have any effect on light, but the distance involved in that formula would be astronomical.