Text at http://howfarawayisit.com/documents/ Music free version https://www.youtube.com/playlist?list=PLpH1IDQEoE8RP8YVxyCQqvkQ0mjvM9rJq In this segment of t...
general relativity, Newton’s gravity, Mercury, Schwarzschild, curvature, Eddington, gravitational lensing, light cone, world-lines, Pound-Rebka, Mossbauer, r...