A light-year is a measure of distance, not time as many people mistakenly believe. One light-year is the distance light can travel in one year in the vacuum of space. One light-year equates to 5.8785 trillion miles.
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To measure the distance of stars you have to measure by light years.
A light year is a measure of distance, not time. A light year is the distance light travels in one year. In one day light travels 16,081,407,123 miles.
one billion light years = 5.87849981 × 1021 miles
48 what, meters? inches? furlongs? light-years? 48 what, meters? inches? furlongs? light-years?
grams besause it is very light