This activity will help you explore the universe by shrinking cosmic scale in just 4 steps. Print out the instructions and cut-out templates. Follow along with the activity by listening to the narration or viewing the American Sign Language in the video podcast files.

Switch scales one last time, and shrink the entire continent-sized galaxy down to 2 inches.

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

Wrap your mind around the vast distances in the universe. What you'll need: a measuring tape, 6 round images from the printable 2-inch universe PDF, a grain of salt and a wide open mind.

If you shrink the earth to about 2 inches or 5 centimeters (cm) in diameter here's how other objects would compare in size and distance.

Switch scales by shrinking the minivan-sized Sun down to a 2-inch diameter.

Shrink the entire Solar System down to 2 inches in diameter.

How likely do you think it is that there is life elsewhere in our galaxy? Intelligent life? What challenges are there in trying to communicate with any potential life around other stars? In other galaxies? Some people say they feel insignificant after understanding the scale of the universe; others say it makes them feel that life on Earth is special; still others feel amazement at the power of the human mind. What's your view?