How to Calculate Your Horizon

Pythagoras did some very rough working out and calculated for about our height. The horizon is about 5 kilometers away, 3 miles for Imperial people, 5 kilometers for us. So if you were standing on the North Pole, at what point can you see the South Pole? You can't ever. But that's half of it, isn't it? Well, you'd be able to see everything from the equator up. And so that's kind of how far away you can see. Although that said, if there's something tall behind the horizon, you can see that. If someone with a big hat sits in front of you, they get in the way. Exactly like with