Every other planet in the known universe is spherical. You can observe this with a telescope. Why would the earth be the only anomaly?

Also how can you explain the movement of the sun, moon and stars every 24 hours? Do they all rotate around the earth on some sort of cosmic conveyor belt? If not, and we assume the earth is flat for arguments sake, the 'flat earth' must itself rotate around a central pivot, but then everything would slide off it right? I'm not trying to be difficult, I would just to understand your counter argument to these points because these points are just a couple out of many which make me remain convinced the earth is a sphere.