기능

• It is an umbrella that allows you to check the phase change of the moon from the position relationship between the moon and the sun.
• Just by going inside the umbrella and going around the center, you can observe the phase of the moon as seen from the earth.
• The moon model is a styrofoam sphere with a surface treatment that makes light shadows easily visible, so the difference between the illuminated part and the shadowed part can be seen easily.