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light-year comparison table
Subject is an instance of is a kind of has symbol has definition
length unit unit  
light-yearlength unit lyThe distance light travels in a vacuum in 1 year. 1 lt-yr = 9.4605 × 1012 km = 0.307 pc (c = 299792.46 km s-1 = 186274 miles s-1). (1 lt-min ≈ 0.13 AU.)

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