The different rotation of star trails from N, S, E, W directions are one of many proofs that the Earth is a cavity, we live on it's inner surface (which is concave), and the cosmos is above and within the center.
Concorde flying at 60,000 ft supersonic, and SR-71 at 70,000 ft supersonic, both had to maintain 5.5 degree pitch up to maintain altitude, because surface below is concave, rising up ahead.