Uploaded June 2026 | Updated September 2026, 1 week ago

$Concave Earth simulation A first pass simulation of Concave Earth Theory, based on my interpretation of general descriptions by key Concave Earth proponents. The surface of Earth is supposedly on the inside of a sphere (as opposed to outside), with the cosmos contained within another inner glass sphere suspended by inexplicable forces. The Sun is a 140km-wide hemisphere with a black backside, again suspended and propelled by more inexplicable forces. Even with convenient bendy light assumptions, I dont see how the Sun can ever appear to set or rise behind an earthen horizon. Instead, it would always rise and set behind the glass sky-sphere. And Earth should always appear to reflect in, and refract thru the glass firmament. This video was originally unlisted, and I sent a link for review by Concave Earth proponents for constructive feedback, so I could update before publicly representing their model. But I only received angry denial and insults, without any specifics. I get the same blanket wrong! response from Flat Earth proponents, without any practical corrections.$

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