 Moon phases uses an internal omni-direction LED lightsource inside a custom 3D printed globe. The 3D printer was able to produce a globe with consistent thickness, so that the amount of light coming out of the different areas of the moon is consistent. An internal hood rotates to ensure that the moon shows its phases, and the power to the LED is built into the hood to allow it to rotate within the globe. We mounted the light source onto a light tube to make sure that we have almost even illumination even below the mount.
This tellurium was a significant design challenge, as the total amount of space inside the moon for the light source and rotating light shield is very limited. The best viewing location for this exhibit is in the center, and the movie shown here is taken with a camera that was hung from the center of the exhibit and rotated with the movement of the moon.
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