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How many miles in 1 lightyears? Convert 1 lightyears to miles with our accurate calculator. Get instant, precise results for all your conversion needs.
Conversion Formula
1 ly = 5.879e+12 mimile = lightyear × 5878792849757.4160161 × 5878792849757.416016 = 5878792849757.421 lightyear = 5878792849757.42 mile
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A light-year is the distance that light travels in a vacuum in one Julian year. It's approximately 5.88 trillion miles.
One light-year is equal to 5,878,792,849,757.4160 miles.
Astronomers use light-years because the distances in space are so vast that using miles would result in extremely large and cumbersome numbers.
No, a light-year is a unit of distance, not time. It measures how far light travels.
Explore the most popular unit conversions across different measurement systems - metric, imperial, and more.