Take it from a petite woman often compared to Tinker Bell — there are lots of clever ways to move heavy objects. Even better if I were a buff and brutal big game hunter circa 3000BC.
More interesting is, always, why.
The archaeoastronomy angle is fascinating. People had little else to read but the sky, and the last thing they saw each night was those lights creeping along up there. Add a pattern recognition propensity and you’re bound to get an ancient astronomer.
They did not need to know they were “stars” and a “moon.” They just knew when the stopped moving to the right (or left) every morning the weather was going to change. If they could count…thats all they needed.