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In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.

In this activity (page 2 of PDF), learners play with a lens and a piece of paper to focus an image on the paper. Learners look at different things, and see how the lenses affect the image.

This fun hands-on astronomy activity uses a variety of simple props to help learners understand why they see what they see in a telescope.