kill yourself, clown   > you can see the earth is flat when you look at homemade rocket videos on youtube kip daugirdass video 56 miles (90 km) above earth  successful amateur rocket launch shows the curve of the horizon. this is visible when the horizon is on either side of the center of the frame. the camera is a gopro with a rectilinear lens. the horizons curve is easily visible no matter where the horizon is in relation to the center of the frame: at 8:14 the curved horizon is below the center of frame, at 8:21 the horizon is above the center of frame.  
Netherlands