It’s obvious the world is a globe, just like every planet, star, comet, satellite, the sun and the moon. I don’t need scientists or Freemasons or Satanists to tell me I can check for myself.
-If you get two people at different distances from the equator, and they measure their shadows at the same time, their shadows will be different lengths. But if the Earth was flat, their shadows would be the same.
-As objects recede from you, they begin to look smaller and slowly disappear in a very unique way: first their bottoms become hidden, and then their tops. If you've ever watched a ship on the horizon, you've seen this for yourself. Similarly, from a great distance, the tops of tall objects like mountains are visible well before their bases.
-And Earth's curvature is clearly apparent from high altitudes, just look out the window of a plane on your next flight.
-Different stars are visible from different parts of Earth, in two very peculiar ways. First, there is the division between the northern and southern hemispheres. So, you can see the North star nearly directly above Earth's north geographic pole, quite easily in northern latitudes.
But as you travel south, approaching the equator, Polaris sinks lower and lower toward the horizon. Once you’ve crossed that boundary, you can't see it at all — it's blocked by the curve of Earth in that direction.
Similarly, as you travel south, new constellations appear — ones that would be completely obscured by Earth's curve if you stayed up north. If you live in an especially flat area, you'll be able to see stars down to the horizon but no farther (because Earth is in your way). But if you travel up — say, to the top of a mountain — you get a better vantage point and can see stars farther down than you could before.
-Flat Earthers argue that Antarctica is actually a massive ice wall around a flat Earth. But, if that were true, the countless planes that fly over Antarctica would surely have just... fallen off?
-a compass works based on the magnetic field generated by the molten iron core at the center of the earth. There is no way a compass could work on a flat earth.
-During a lunar eclipse Earth passes between the sun and the moon, allowing Earth to cast its shadow on the moon. That shadow is always, always, always a circle, no matter where you are on the planet, no matter the timing of the eclipse. Always.
The only way to always cast a circular shadow is if the thing casting the shadow — in this case, Earth — is a globe. It's a matter of geometry.