Choose any constellation due East or West on the horizon at a definite time. For example, in London the belt of Orion appears on the horizon, due East, at 21:07.
Using software such as Stellarion shows that Orion will appear to rotate anticlockwise as you change latitude, i.e. move due North or South. For example, at 80deg North, he is standing upright with his belt on the horizon. At 80deg South only the bottom half of his body is visible, with his legs sticking up in the air.
This is easily explained on the RE hypothesis. How can we devise an FE theory consistent with the observations. Some questions
1. Is the astronomical software correct? I.e. are the actual observations consistent with what the software imples?
2. Assuming it is, do the stars lie in a flat plane above the earth, or at different distances from the earth?
3. Do any of them lie beneath the earth at any time? This could easily be verified by observations at the same time at different time zones. (Note there can be no observers living below the flat surface of the earth).
4. Is there any observable stellar parallax? Standard astronomy says that none is apparent without accurate instrumentation. If so, the stars must either be a very long way away, or they lie in a plane, parallel to the surface of the earth.
5. If in a plane, how do we explain the Orion phenomenon? There was a similar phenomenon noted here about apparent moon rotation, which FE explains as the result of the bottom of the moon only being visible. Clearly if all the stars in Orion lie in a plane, we need to explain how the top half of Orion is visible only in the Northern latitudes, with the bottom half only visible in the Southern latitudes. We need a very complicated theory of perspective or light bending to explain this, but I am working on it.