Three goals is vivid portrayal, ground, on relative law between intuitive teaching instruments, it can simulate the day, month, explored the relative position in space, and can vividly show the movement of the earth, the moon, scientifically explain the resulting all kinds of natural phenomena. Therefore, it is an indispensable teaching assistant tool to overcome abstract teaching, to deepen students' mastery of the law of movement of celestial bodies and to popularize knowledge of astronomy.

Method of use

The demonstration is required in the shading chamber. The earth turns around the sun, and the moon revolves around the earth. It can see the moon and the moon. When the earth moves between the sun and the moon, it forms a lunar eclipse. When the moon moves between the sun and the earth, it forms an eclipse.