If the world was indeed flat the measured angle to any star would remain the same no matter where you were on the flat world. Because the globe is actually round the measured angle to any star changes as you move towards or away from it. For example the angle to the north star gets smaller (in relation to Horizontal) as you go further south. This would not happen on a flat world. This is just basic geometry stuff.
BLS
I don't understand that. If the world were a pancake but were still circling the sun and rotating on an axis and oscillating on that axis, wouldn't you still get different angles to the stars?
Also, if the Earth were a pancake, would places like Australia and China actually be places we could get to with a really good posthole digger? <img src="http://www.catsailor.com/forums/images/graemlins/smirk.gif" alt="" />
