Eli5: Why do planets look like stars?

Question

Eli5: Why do planets look like stars?

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Answer 1

They don’t. They don’t twinkle like stars (as stars are single point sources of light, but planets are bigger). They also “wander” in the sky in different directions than the stars. That’s where the word comes from.

* Greek: Πλάνητες Planētes, “Wanderers”