Astronomical unit - Wikipedia
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Earth Shaker - #AstroMeme How far is far? We often measure distances in space using astronomical units (AU) and light-years (ly) because of the superb distances. 1 Astronomical Unit (AU) - average
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Comets, Meteors and Asteroids. Astronomical Units (AU) and Light-Years (ly) ( AU and light years are both measurements of distance, generally used to. - ppt download
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Light-year - Wikipedia
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What is the difference between astronomical units and light years? - Quora
