Biruck :
Great explanation overall. one thing i'd love to mention is on the curvature of space time. you explained it very well, but on the image you used, there's a highly misleading interpretation of curvature of spacetime. your image(and most other videos on the internet) uses a mass(the earth) when it bends space, but the bending is in 2D, only downward . however, when there's mass/energy, the bending isn't in that way, instead it's in all dimentions of space, i.e 3D, and time as well.
so this interpretation of curving downward, unless it's to.simplify things, is very wrong because it describes gravity by gravity, which's wrong, as gravity doesn't cause curvature , but it itself is the curvature . so what happens is that the space is bent towards the massive object from all directions.(i attached an image) this is what i wanted rk point out
2026-11-07 04:57:31