The horizon can exist on a Flat Earth. The horizon defines the Vanishing Point.
I haven't seen any evidence that astronauts have gone to "outer space".
Seasons happen in FET. Please read the FAQ.
The earth is not a planet.
Circumnavigation is possible on a Flat Earth. East and West are always at a right angle to North. Traveling Eastwards takes you in a circle around the Northern Hub.
Do you see what you did there? You took all the evidence that there is for a round earth, and showed that it can also be interpreted as evidence for a flat earth. It looks to me like there's a post hoc ergo proctor hoc going on here. Let me make this simple:
You're saying that there is no evidence that the earth is round.
However, I just gave 5 facts of evidence.
You dismissed them as evidence for a round earth, and simply gave a way to fit them into your flat earth theory.
However, notice the difference between the round earth and flat earth model: the round earth model instantly fits into the
5 facts explained above. The flat earth model requires additional theories and hypotheses in order to fit into the 5 facts (i.e. the vanishing point, earth is not a planet, etc.)
Flat earth theory requires additional theories and hypotheses in order to fit into reality, therefore the burden of evidence lies with YOU.