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Can anyone bring me proofs from the Gemara that proves the world was round-and that this was known 2000+ years ago?

I have looked around and I can't seem to find any sources which prove this.

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related judaism.stackexchange.com/questions/36845/… –  YeZ Jun 10 at 13:39
    
related: judaism.stackexchange.com/a/22852 –  msh210 Jun 10 at 22:16
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Do you mean circular or spherical? –  Double AA Jun 11 at 13:53

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up vote 9 down vote accepted

See Gemara and Tosfos Avoda Zara (41a K'Kadur)enter image description here

shetofes es atzmo tachas kol haolam kulo k'kadurenter image description here

"shetofes es atzmo tachas kol haolam kulo k'kadur"

Tosfos says "Because the World is round"

Tosfos references a Yerushalmi which echoes this point: "Alexander the Macedonian ascended on high until he saw the earth like a ball and the sea like a platter. The 'sea' refers to the ocean that encompasses the entire earth"

Also see the Yaavet'z on this Tosfos in the back of the gemara

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This is a good answer (and +1), but it would be greatly improved if it featured a translation into English. Especially of the passage in the Yerushalmi, since that's the part that best answers the question that was asked. –  Shimon bM Jun 10 at 11:13
    
I haven't looked it up, but just from what you copied here of the tosafos I don't see it as difficult? "The world is spherical, as it says in the Yerushalmi: Alexander the Macedonian ascended on high until he saw the earth like a ball and the sea like a platter. The 'sea' refers to the ocean that encompasses the entire earth". –  Shimon bM Jun 10 at 11:25
    
@Nafkamina Looks like an accurate translation to me. –  Scimonster Jun 10 at 11:34
    
Could someone translate this for me please? –  user5523 Jun 10 at 12:54
    
See also my discussion of this Yerushalmi, about a ball on a plate. parsha.blogspot.com/2010/11/… –  josh waxman Jun 11 at 0:41

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