So, on flat earth the earth is in the centre of the universe, and everything in the sky is not millions of kilometres from earth, but much closer. For instance in most models the sun is about 5000 km from earth surface (quoting the wiki "Later researchers have estimated the sun to be at about 3000 miles above the surface of the earth, with the stars at about 100 miles above that"

So there are a number of things in the sky we can observe. And how are these phenomena explained in a flat earth model.

  1. Sun rise and set.
  2. North pole star and inclination when moving south.
  3. South Pole area (as there is no star), but lets take the southern cross as a reference.
  4. Seasons
  5. Path of the planets in the sky.

 

Sunrise and sunset

 On a flat earth, the sun cannot go below the horizon. Instead, due to the effect of perspective, the sun will appear so small and low to the horizon, that light from the sun will fail to reach your point on the surface.

 

North pole star and inclination when moving south.

 

South Pole area (as there is no star), but lets take the southern cross as a reference.

 

Seasons

 

Path of the planets in the sky.

How would they work on a flat earth?