I think if you stood on a perfectly flat, infinite plane, with no visibility limitations, you'd appear to be standing inside a sphere.
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Why is that? I guess the obvious science question is "perfectly flat relative to what?"
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What size sphere? Actually I've played around on such a plane in 3D space, and the horizon's pretty distinct.
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Infinite plane infers infinite universe. In an infinite universe, anything is possible. So stop dickin' around and DO SOMETHING!
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sphere or circle also is the plane the same color as the space above it?
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I see other replies don’t get your point. It’d have to be REALLY big for gravity to bend light rays back to it. And dense.
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How about a physics discussion instead. Does "no visibility limitations" mean you can see light before it's actually arrived?