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Light-year
01
année-lumière
the distance that light travels in a year
light-year
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Exemple
ideas that are light-years ahead of their time
Astronomical distances in space are often measured in light-years, the distance light travels in one year.
The farthest galaxy ever observed is located billions of light-years away.
The telescope can observe stars that are deep in the universe, billions of light-years away.
