and how are the same stars seen to the south of australia as to the south of africa and south america at the same time.
Who reported seeing the same stars from Australia, Africa, and South America at the same time?
No one, but if the earth was in fact flat, you wouldn't see different stars at the southern hemisphere, but you do. And you can't explain how this is possible (you say it has something to do with light bending, like in Robosteve's thread
here), but you cannot explain anything specific. What is bending the light, has this "force" ever been observed or measured?
And like I said, where is the data that shows that gravity is much much stronger than it appears to be? It HAS to be much stronger (per mass) that what we observe, because if it isn't, there is no way that the sun and the moon's gravity can have the effect you are asking for with today's gravitational pull per mass.