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Article
Other

National Research Foundation: How Far? How Big? How Many?

For Students 9th - 10th
Using light as our measuring stick in space, science site provides all types of fun facts using light years and seconds as a reference.
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Handout
Other

Nso: Astronomy: Light Year

For Students 9th - 10th
Brief informational site provides the definition of a light year as well as a chart of "Light Times" from Earth.