hi! fyi, one or more of these threads may be relevant

• What is the earliest record of a person theorizing that stars are suns and planets?

• When did scientists recognize the planets in our solar system as (relatively) nearby planets, and not as other stars. How did they know that these celestial bodies were planets and not stars?

• When did people realize that planets were not just moving stars?

• When did humans become aware that they were on planet Earth, in a solar system, and part of the Universe?

It might also be worth x-posting to /r/AskScience (astronomy) for info on early astronomical theory, and /r/AskAnthropology