• nexguy@lemmy.world
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    2 天前

    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.

      • nexguy@lemmy.world
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        4 小时前

        As the moon sets the shadow would become a flat line on the moon. The shadow would change shape and only be a prefect circular curve for a short time.

    • RaphaelSchmitz@feddit.org
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      23 小时前

      The only way this answer could have been more hung up on the letter instead of the spirit of that comment, would be if you had said “with just your eyes you can watch a video explaining that the world is round”.

    • FishFace@piefed.social
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      2 天前

      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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        1 天前

        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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      2 天前

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