Board Thread:Naruto Discussions/@comment-434627-20160606143610

The Infinite Tsukuyomi is supposed to bring the entire world under genjutsu, by reflecting the Rinne Sharingan off the moon. It's also stated by Black Zetsu that the light coming from the moon is what causes someone to fall under IT. The problem is, the moon is never visible to the entire planet at the same time. The only way this could work, as far as I'm aware, is if the Earth was flat.

Is the Earth actually flat in this series, or is there anything else that confirms it one way or another?

(There's also the question of how the Moon could stay in orbit if the Earth was flat, but that's more a question of physics - and I'm pretty sure you shouldn't try to apply the physics of this world to the Naruto world.) 