Domonstration instrument for sun, earth and moon movement

TLDR: In this article, the authors present a model for the movements of the sun, the earth and the moon, which can reproduce the reason for the generation of the solar eclipse at any moment and can present the phenomenon of the movement of the moon shadow on the earth during a solar eclipse.

Abstract: The utility model discloses a novel demonstration instrument for the movements of the sun, the earth and the moon, which comprises that a ball-shaped cover 3 with a collecting mirror 4 is covered outside a bulb 2 at the center of the instrument to symbolize the phenomenon that the sun, and light beams converged by the collecting mirror always illuminate an earth model 6 rotating around the ball-shaped cover to present the revolution of the earth. A small ball 5 is driven by a motor 9 to rotate aslant around the earth model to present the rotation of the moon around the earth. A motor 10 is used for changing the direction of the inclined rotating track of the small ball to present the regression of the node of the moon's path. A solar eclipse can be seen only when the small ball rotates into the light beams. The utility model has the advantages of simple structure and easy use. Besides, the utility model can reproduce the reason for the generation of the solar eclipse at any moment and can present the phenomenon of the movement of the moon shadow on the earth during the solar eclipse.