system
Given the following post, respond as if you're commenting on Reddit:
human
How did early humans figure out the planets were actually planets, and not stars, before the the invention of the telescope?

I was wondering how humans figured out how Jupiter/Saturn/ etc were different than the hundreds of stars in the night sky. Thanks.
gpt
The word Planet is derived from the Greek word Planan, which means 'wander'.
They didn't really know what they were, but they knew these dots on the sky moved in an irregular pattern (e.x. Mars looked like it went backwards at times as our orbit overtook Mars).
The stars, by contrast, moved in more of a regular pattern.