In looking at the answers to this question regarding light from distant galaxies ever being visible to us:
I came across a few concepts that were quite surprising to me. In particular:
Movement faster than the speed of light
The big bang was not an explosion outwards from a single point.
Granted I am just a rank beginner and self-studier, yet I did study a QM course from Oxford, have read several sets of notes on SR, and readily went through the first hundred pages of "Student Friendly QFT."
Yet I have never encountered these notions.
My question is where does one acquire this type of information. Not necessarily the technicalities (of, e.g., GR); but just a correct awareness.