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What is the difference between a light-year and an astronomical unit?
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What is the difference between a light-year and an astronomical unit?

User Kallz
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a light can litterally be in a flash 
User Mark Varnas
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One light year is almost six trillion miles. And an astronomical unit is the average distance between the Earth and the Sun. So the distance to the Sun is by definition one AU.
User Alex Nazarov
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