Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

How to make a DIY cardboard planetarium and projector

Watch more with these video collections:

What can you do if you’d like a small planetarium room for your school, but the price is outside of your budget? Billings, Montana science teacher Craig Beals ran into this problem in 2016 and decided to team up with fellow high school science teacher Catherine Combs to make a Cardboard Planetarium Project for their science and geometry classes. He writes:

“While doing research for the project I found information about building large-scale geodesic domes at Desert Domes, which proved to be a great starting point to figure out dimensions of different frequency domes.”

small scale domes

“Students then scaled up the dimensions for a 4V (frequency) dome. This type of dome required 6 pentagons, 5 full hexagons and 5 half hexagons (information below). We chose this configuration because it meant we only needed to cut out two different types of triangles: Pentagon triangles with sides labeled AAB and Hexagon triangles labeled BCC (information below). We bought a pallet of corrugated cardboard with white on one side and cardboard brown on the other, made some templates and began cutting triangles.”

students fitting the dome together

“Initially we had planned to use extra large 1 inch binder clips to hold the structure together but this proved to be fatal two times. The entire dome collapsed as binder clips slid off the cardboard and went shooting across the room. With two fails under our belt, we had to rethink our plan.

“Eventually I found Mr. McGroovy Cardboard Rivets online, and they proved to be just the tool needed to get our massive dome built. It takes a team of people to hold, rivet, add a triangle, hold, rivet, repeat, but it is well worth the effort!”


Visit his site for pdfs of the Cardboard Planetarium Plans, the Cardboard Planetarium Layout, a materials list, and more information about how they set up a planetarium projector from a convex mirror, projector, and computer.

“The planetarium and projector system works perfectly with Stellarium, StarWalk, and any warped planetarium video.”

Find all links and notes here on BealsScience.com.

cardboard planetarium
Watch these science and teacher demonstrations next:
• Make your own Fabric of the Cosmos demo
How to build your own Wave Machine physics demo
• Jell-O Earthquake in the Classroom
• A pendulum wave demonstration with bowling balls
• Fourth graders create a solar powered classroom
• Erosion demonstration: Comparing grass, dead leaves, and soil
• Make Lissajous patterns with DIY sand pendulums or light
• Angular momentum demo with a Hoberman Sphere

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.

🌈 Watch these videos next...

Why do honeybees love hexagons?

Rion Nakaya

Which ball will race to the bottom first?

Rion Nakaya

What happens to balloon animals in liquid nitrogen?

Rion Nakaya

What happens to a flame in an electric field?

Rion Nakaya

Weight distribution on light bulbs and eggs, a physics demonstration

Rion Nakaya

The most amazing thing about domino chain reactions

Rion Nakaya

The Hypercube: Projections and Slicing (1978), an animated tour of a 4-dimensional cube

Rion Nakaya

The Electric Sausage: A static electricity demonstration

Rion Nakaya

Teacher creates personalized handshakes for all his students

Rion Nakaya