For the simple fact that humans lack faith and have to see it to believe it they sure believe the space lie without ever experiencing a trip to the moon. Nathan Oakley in Flat Earth Debate has good questions that no one can seems to answer. What is the r value from the surface of the earth since they always use the r value from the center of the earth stating there is a measurable curve. True distance to the sun since triangles dont have curves you cant use angular measurements to determine distance. Proof of gas pressure and vacuum without a container.