What is a light-year?
What is a light-year?

What is a light-year?

A light-year is a unit of distance used in astronomy to measure the vast distances between celestial objects. It represents the distance that light travels in one year in the vacuum of space, approximately 9.46 trillion kilometers (or about 5.88 trillion miles). Light-years are used to express distances to stars, galaxies, and other objects beyond the solar system, providing a convenient way to describe cosmic scales and the immense size of the universe.

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