every planet is (approximately) flat if you only consider a small portion of its surface area.
knowing that the planet is a sphere is only relevant if you’re doing (a) worldwide business/travel (shipping routes, airplane routes, …) or (b) spaceflight due to orbital mechanics.
every planet is (approximately) flat if you only consider a small portion of its surface area.
knowing that the planet is a sphere is only relevant if you’re doing (a) worldwide business/travel (shipping routes, airplane routes, …) or (b) spaceflight due to orbital mechanics.
C) Playing with shadows from buildings and sticks.