Please explain:
- Why gravitational surface acceleration varies along the surface of the Earth and with altitude
- Why I can literally take a picture of the ocean front 1000 feet up and measure AND SEE the curvature of Earth by drawing a line through the picture on a computer
- How exactly an Earth mass of flat rock is stable
- Why I can't send radio signals directly from Los Angeles to Moscow
- Why I can send radio signals from Los Angeles to Moscow by bouncing them off of the obviously spherical ionosphere
- Why I can predict the orbits of satellites using only the law of gravity and math, and accurately determine when they will pass over, if their orbits depends on the curvature of Earth
- How some Greek philosopher could figure out that the earth was round thousands of years ago by realizing that some shadows looked different but you can't figure it out despite having access to more information than any other time period in the history of humanity