Light-years
What is a light-year? A light-year is 9.4607304725808 × 10¹⁵ m: the distance light travels in vacuum in one Julian year of exactly 365.25 days. Convert ly…
About these units
A light-year is 9.4607304725808 × 10¹⁵ m: the distance light travels in vacuum in one Julian year of exactly 365.25 days.
Also known as
ly · light-year · light-years · light year · light years
Source: International Astronomical Union — Measuring the Universe
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