+A light-year is a measure of [Distance](/wiki/distance) across the cosmos, representing the vast span light traverses in a single Earth year. It unveils the scale of the [Universe](/wiki/universe), where distant stars appear to us as light from the past, journeying at the [Speed of Light](/wiki/speed_of_light).
+## See also
+- [Astronomy](/wiki/astronomy)
+- [Parsec](/wiki/parsec)
+- [Cosmos](/wiki/cosmos)
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