A light-year is an unusual unit of measurement, defined as how far light can travel in vacuum in one Julian year. Which of these is the best estimate of a light-year?
Answer 6 trillion miles
If you were super quick at math, you could have calculated this yourself. If light travels at 186,000 miles per second, and there are 31,536,000 seconds in a year, all you have to do is multiply the two together to get almost 6 trillion!
Asked by Tom Cohen · Last updated 5 years ago · 802 views
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