What keeps ticking in the vastness of space, measuring the life of stars but never needing a battery?
Category: Science · Difficulty: medium
Hint: Think about natural processes that measure time in astronomy.
Answer
A stellar cycle
Explanation
A stellar cycle refers to the life stages of a star, which measure time in terms of its lifecycle.
This is a medium science riddle — a moderate challenge for most people. The answer is A stellar cycle.
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