Flat earthers: your local Sun fails the daylight test, again. The Sun keeps exposing the problems with flat Earth. You don’t need special equipment to check its rising, setting, and movement across the sky. You need your eyes - and a model that explains what they see. This video compares the same daylight pattern at the same moment on two representations of Earth: an azimuthal equidistant map, adopted by flat earthers with a local Sun circling above it, and a globe illuminated by a distant Sun. Watch what happens as the seasons change. In December, daylight surrounds the entire Antarctic rim on the map, while a large interior region remains dark. That’s the Antarctic 24-hour Sun, witnessed firsthand during The Final Experiment. On the globe, that pattern follows naturally from Earth’s shape and tilt. Now add their proposed local Sun. How does a spotlight circling above the tropics illuminate the entire outer rim, including the opposite side, while leaving the interior dark? Making the spotlight bigger doesn’t solve that problem. Calling it a glowing ball or a “luminary” doesn’t supply an explanation either. Your model must reproduce where people actually see the Sun, when it rises and sets, and how those observations change with the seasons. I expect the usual memes, accusations, and recycled claims by Flerfs in the replies. Watch how many avoid the actual question: How does your local Sun produce this daylight pattern? It doesn’t. It can’t. Just watching the Sun debunks flat Earth.

But here’s the thing. We DO know what gravity is. It’s a property of spacetime, described by general relativity, with extraordinarily precise experimental confirmation. You’re asking whether we understand its ultimate, deepest, most fundamental nature. Well, by that standard, we don’t know what ANYTHING is. Not energy, not matter, not spacetime, not even the fundamental fields of physics. You can always ask one more “but why?” until you reach the limits of current knowledge. That doesn’t invalidate everything we learned on the way down. If knowing what something is requires knowing why reality itself exists and operates as it does, then physics apparently knows nothing. 😁

Flat earthers love to keep yelling "perspective!" at everything. Converging sunbeams? Perspective! Ships over the horizon? Perspective! Fine. Let's actually use it. Watch these shadows. Parallel from above. Converging from down low. Same shadows, same sun. If converging lines meant a nearby light source, the shadow lines here would put the sun parked a few feet past the road. But follow the actual light rays over the tops of the posts and they meet the sun high up in the sky. And from above, the shadows are parallel. That tells you the sun is so far away its light rays arrive essentially parallel. Explained properly, perspective only ever validates the globe. Flerfs, the word you endlessly regurgitate is just another nail in your coffin.

I keep repeating this phrase because it's really the only thing anyone needs to say. It fully debunks the idea, in one simple visual: On a flat Earth with a local sun circling above it, the sun would remain visible to everyone, everywhere, all the time. It would never rise nor set. It would only change size during the day as it swings further away and then comes back close again. And yes, that includes perspective, angular resolution, atmospheric haze/extinction and "too far to see." All of those have been considered, and none of them can rescue an impossible model. All the other arguments, all the other memes that Flerfs produce, all the broken physics, manufactured scenarios and outright lies are completely meaningless. Their own model can't survive what everyone sees all day long. The fact that this is so simple, so basic, so final - it breaks Flerfs' brains. Cognitive dissonance takes over, and in the comments they will flail around, throwing the same tired terms and memes (related or not) like an angry child throwing broken toys. Watch for it. Not one of them will show how their sun gets below the horizon. They can't, because the model they themselves came up with debunks itself.

This is what hitting the atmosphere at about 35 times the speed of sound looks like from the inside. Artemis II, April 10, 2026. Four astronauts on their way back from a flight around the Moon. Most of it is sped up 10x, but I dropped to real time for the best of the plasma so you can hear the thrusters firing. Every time the view jumps, that's them. And that tiny dot at the very start? That's the Moon, setting behind Earth. Video: NASA