light-year

n.

光年；

1. The distance can be expressed in light years.
   距离可以用光年表示。
2. A place that requires one year for light to reach is one light year distant from us.
   因此光需要一年时间才能到达的地方离我们也就是一光年的距离。

Light Year
Light-Year
Light-Year
Light-year Scale Radio Cores in Four LINER Galaxies
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MP3 David Pritchard - Light-year
The Origin of the 30 and 18 Million-Light-Year Separation of Single Galaxies and Clusters of Galaxies in the Filamentary Cosmic Netw...
Galaxy Charts: The 1,000-Light-Year View of the Data
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Extrasolar planet, Light-year, Constellation, Ara (constellation), Star, HD 154857
Deep in the Hundred-Light-Year Wood
Million-light-year galaxies and spectral forests