Light-year
Storyboard Descrição
A astronomical unit of distance equal to 9.5 trillion kilometers (5.9 trillion miles). It is defined as the distance light travels in an Earth year.
Texto do Storyboard
- LIGHT- YEAR A astronomical unit of distance equal to 9.5 trillion kilometers (5.9 trillion miles). It is defined as the distance light travels in an Earth year.
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