Make a Constellation Projector

How to Make a Constellation Projector

An easy and fun project and I give you a bunch of learning activities to go with it – I also have a video tutorial you can watch. It is at the bottom of the page.

Along with this tutorial on how to make the projector comes a free template with sixteen constellations and all the plans for making it. I also have some great project and activity guidelines that will help you make the projector even more fun, (The Template for this project is here ) and a bit of a learning project so kids and people can learn more about the night sky. The activities are right here.

How it works

It is a very simple set up. It is a box with an aluminum foil lining. On one end of the box is a flashlight and on the other end is a place to put index cards with constellation pin holes in it. The flashlight shines light through the pinholes in the index card thus casting stars on a wall.

What you need to make this project:

  • 1 sheet of foamboard (corrugated cardboard will work too)
  • Some type of glue or a hot glue gun
  • Some aluminum foil
  • 1 small flashlight with a single bulb in it. Not a flashlight with multiple bulbs
  • The template I give you
  • An xacto or hobby knife to cut the foamboard
  • Scissors
  • Pencil or Pen
  • Index cards (3×5) but this is optional
  • Some kind of pin, pushpin or needle to pierce the star holes in the index cards

About the flashlight

Try to get and use a flashlight with a single bulb or LED in it. There are many flashlights that have multiple bulbs in them. Those are a little bit trickier to use for this project. They will often cause each star to cast multiple stars on the wall.

A single LED flashlight

Multi-LED flashlight.

You can also watch the video tutorial here: