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+A light-year is a unit of [Distance](/wiki/distance) representing how far light travels in one Earth year. It measures the immense scales of the [Universe](/wiki/universe), reminding us that looking into deep space is also looking back in [Time](/wiki/time).
+## See also
+- [Light](/wiki/light)
+- [Astronomy](/wiki/astronomy)
+- [Speed](/wiki/speed)
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