• nexguy@lemmy.world
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    13 hours ago

    With just your eyes you see it is round as ship masts dissappear last as they sail away. Also with just your eyes it must be round as the curved shadow on the moon surface during a lunar eclipse can only be produced by the shadow of a sphere.

    • FishFace@piefed.social
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      11 hours ago

      With just your eyes… And a big lake or sea… And a ship… And the knowledge that water lies level.

      Similarly it’s not exactly understood from birth that lunar eclipses are the earth’s shadow.

      You gotta work all these things out and make more complicated observations than just looking at the horizon.

      • nexguy@lemmy.world
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        6 hours ago

        You’re right, I should have come up with a way to tell the earth is flat with just your eyes but of course nothing around to cheat with like things to see with your eyes.

    • anomnom@sh.itjust.works
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      10 hours ago

      The moon rotating at the same rate as its orbit and always facing earth could be used to reinforce the convex shape idea.