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How High Up is Space? (An Astronomy Activity)

How High Up is Space? (An Astronomy Activity)

How big is Earth's atmosphere and where does space begin?  This is a question many students (and people) in general grapple with and have trouble picturing. This classroom-tested activity uses scale models and easy calculations to place different things above our heads into perspective.  It comes with an article that describes how scientists have tried to answer this question over the decades....

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