Also, over time the stars have changed position, even relative to each other. Polaris was not the North Star 2000+ years ago. I’ll have to check it to see if it makes a difference.
Yes, but anybody with a computer can run a little program to calculate the positions of the stars for any time in history and it will show you what the constellations looked like. I had a program that would do that back in the 80s, so nowadays there is probably a free app for it.