A place for people who question things and care about what's true. We argue from observation, photos and geometry anyone can check. No appeals to authority, no insults.
Sun 3,000 miles up and 32 miles across, the most common flat-earth figures. It lights a round patch; the edge of that light is a cutoff we chose, since a flat-earth sun has no natural one.
A distant sun lights half the Earth at once. The axis is tilted 23.4°, so through the year first one hemisphere, then the other, leans toward the sun. That tilt is why there are seasons at all, and why they're reversed north and south. The grid around the Earth marks degrees measured from the direction of the sun; the gold arc shows the axis tilt against straight up. Sizes and distances are not to scale.
Search any place and pick a date. See when the sun actually rises and sets there, and what the flat-earth sun would give it instead.
The blue pin marks that place on either model.
The white marker on each bar follows the time on the model above. Flat-model daylight counts any moment the city is within reach of the flat-earth sun's light, using the reach set on the model above.
Pick any date and hour. Which model matches where it's day and night around the world at that moment? Try Now, then ask someone on another continent.
Bring an observation, a photo or a calculation someone else can repeat. Credentials don't settle anything here.
No name-calling and no mocking, from either side. Assume the other person means well.
Changing your mind when the evidence calls for it counts as a win, not a loss.