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In this activity, learners explore the relative size of the Sun and Earth as well as the distance between them.

In this activity, learners build a 1:140 "scale model" of NASA's X-33 Reusable Launch Vehicle (RLV) Technology Demonstrator, and investigate how the model dimensions compare to the real vehicle.

In this space science activity, learners work together to create a human-powered orrery to model the movements of the four inner planets.

In this activity, learners explore how distance can affect the way we perceive the size of an object.