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Have you ever heard of a light year? Surely yes, but do you know what it is?
A light year is the distance light travels in a year in a vacuum. Although it sounds impressive, it is not such a complicated concept.
To put it in perspective, the speed of light is approximately 300,000 km/s, and a year has 31,536,000 seconds. If we multiply the speed of light by the number of seconds in a year, we get the distance that light travels in that period, which is approximately 9.46 trillion kilometers.
In conclusion, a light year does not measure years, it measures kilometers.

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