2:29 AM
4

People have been saying that a global frame of reference does not exist in General Relativity. However, from Wikipedia: In Schwarzschild coordinates ${\displaystyle (t,r,\theta ,\phi )}$ the Schwarzschild metric (or equivalently, the line element for proper time) has the form {\displayst...

13 hours later…
3:30 PM
2

Im a bit puzzled about the video from “One Minute Physics” claiming that Newtons law of gravity is not universal, but breaks down on very heavy objects and are not really confirmed on very light ones. https://youtu.be/OTMELHUAzSM I found the topic interesting, also because I teach basic physics i...