You can use this 4-STEP SCALE MODEL to imagine some of the distances involved in NASA's explorations of the universe.

NASA's The Incredible Two-Inch Universe Activity (Audio & ASL)

Going Further

A NASA-Smithsonian Universe Forum Publication :: This activity will help you explore the universe by shrinking cosmic scale in just 4 steps. Print out the instructions and cut-out templates (printer-friendly PDFs at http://chandra.harvard.edu/resources/podcasts/2inch/). Follow along with the activity by listening to the narration or viewing the American Sign Language in the video podcast files.

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NASA's The Incredible Two-Inch Universe Activity (Audio & ASL)