Science museum gallery
Use the rim control as directed by the exhibit instructions.
VIDEO DEMONSTRATION 16 sec
Physical reference footage · Silent edit
View the cylindrical moon phases exhibit from outside and look briefly into its dark viewing slot. The reference does not show a complete, clearly exposed phase-changing sequence; the web edit is silent.
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Use the rim control as directed by the exhibit instructions.
Compare the illuminated portion visible from the viewing position.
Relate the result to the represented positions of the Sun, Earth and Moon.
This guide describes the visible action. The final performance and operating specification are agreed for the project.
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