Foldable Solar System

​Ask a student to draw the solar system, and you'll almost always get evenly-spaced circles marching across the page — Mercury, Venus, Earth, Mars, then a jump straight to Jupiter, like they're all just a few steps apart. It's not their fault. Every textbook diagram and classroom poster is drawn out of scale, because if it weren't, half the planets would be too close together to even label.

This activity fixes that misconception with nothing more than a strip of paper and a handful of folds. Students start by labeling one end "Sun" and the other "Pluto," then work their way inward — fold in half for Uranus, fold again for Neptune, again for Saturn — halving the distance over and over until the outer planets are spread across broad, generous sections of paper and the four inner planets are scrunched into a tiny sliver near the Sun. No rulers, no math, just a paper model that makes the true structure of the solar system impossible to un-see: it's mostly empty space, and the "inner solar system" we think of as roomy is actually a rounding error next to the gas giants.

It's quick, it's hands-on, and it gets at the scale surprisingly effectively without any measurements. Versions of this activity exist elsewhere online but I wanted to share the slides that we put together to visually walk through the procedure. This activity is great for my 9th graders that struggle a little bit with the larger number math of outer space and I think it could work well in middle or even elementary school to introduce these concepts.

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Set up

The only set up required is to prepare strips of paper. When I run this in my classroom, I like each student to have their own set up so that everyone has something to work on. Strips of paper could be made with receipt paper or even toilet paper but I have usually just cut strips the long way from pieces of 11x17 paper. You can easily get 3-4 strips this way without any cutting and taping required :)

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Activity

This version of the activity is communicated through a series of visual slides. It would be easy to add some follow up calculations to determine the scale for the model produced and extend it to determine the distance at this scale to the nearest star, Proxima Centari.

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Files

Foldable Solar System (pdf)
File Size:	534 kb
File Type:	pdf

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Foldable Solar System (editable google slides)

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Acknowledgements

I first heard about this simple approach of scaling the solar system from Chandler Beasley during a shareathon at the LIGO Internation Physics and Astronomy Program in 2025. I couldn't stop thinking about the simple hands on approach that allows students to interact with the concepts without getting lost in the math of it all.

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