We're lucky the Earth is round because if it weren't, almost everyone's view of the sunrise and sunset would almost always be blocked!
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I'm curious what it is!
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In general, isn't earth's topological spectrum (layered on top of the sphere) blue, with a ratio of hill height:hill distance that is downward-trending?
Then, the angle that the ground obstructs the sky on a flat earth is very close to the present angle.
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But I think that, all effects that depend on the re-scattering of light (after the start of civil twilight; a lot of the sunset) basically don't occur anymore. For anyone—anywhere—on a flat earth.
Convex earths are another matter.
