If I look into the sky and I see two yellow dots it’s all stars for me. Then I hear one of them is mars and I’m like „ok, still looks the same“. How did the people hundred of years ago discover what’s a close planet and what’s a far away star?
As you get older you notice long term patterns, you can see the moon moving, notice stations, etc. I’m sure with nothing else to do you would get use to the sky and notice one of the “stars” moves around over time.
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