I move in endless rounds yet stay in one place; I mark passing without a sound. What am I?

Category: Brain · Difficulty: expert

Hint: Consider how some things revolve without audible noise.

Answer

A planet's silent orbit

Explanation

Planets orbit stars silently, completing cycles without making sounds detectable to human ears.

This is a expert brain riddle — one of the harder riddles here. The answer is A planet's silent orbit.

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