What measures the vastness of the universe, yet is often represented by a simple yardstick of light?

Category: Science · Difficulty: hard

Hint: It's a unit of distance used in astronomy.

Answer

Light years

Explanation

Light years measure how far light travels in one year, often used to describe astronomical distances.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Light years.

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