Model of sun-moon-earth

Abstract

The invention relates to a model of sun-moon-earth. A moon orbit generating apparatus fixing plate (1) is connected with an earth rotation shaft (6); an earth orbit generating apparatus fixing plate (2) is connected with a bracket (7); a moon rotation shaft (3) is connected with a moon orbit straight gear combination (29); the earth rotation shaft (6) is connected with an earth supporting vertical shaft (18); the earth supporting vertical shaft (18) is connected with an earth orbit straight gear combination (13); a sun (8) is connected with the earth orbit generating apparatus fixing plate (2); a moon (4) is connected with the moon rotation shaft (3); and an earth (5) is connected with the earth rotation shaft (6). The model of sun-moon-earth has the advantages that: the mutual positions of the earth, the moon and the sun in the space are relatively truly displayed; and the running conditions of the earth and the moon and the principles of appearance of four seasons, moon wax and wane, solar eclipse, lunar eclipse and the like in the running process are relatively accurately reflected.

Description

1. Technical field [0001] The invention belongs to a teaching instrument, in particular to a three-ball instrument. 2. Background technology [0002] With regard to the relationship between the earth, the moon and the sun, there is currently no teaching instrument that allows students to see and touch them and to reflect their operation more truly. When teachers teach this part of knowledge, some draw some schematic diagrams on the blackboard to explain, and some make some simple teaching instruments to explain. The more common way is to fix an electric light on a platform. The sun is a focal point, draw an ellipse on the platform, let the globe move along the ellipse, and at the same time let the earth on the globe rotate around the axis of the earth, so as to demonstrate the situation that the earth revolves around the sun and the earth rotates. The demonstration of the moon's revolution around the earth and the moon's rotation can only be done by holding a large ball in ...

AI Technical Summary

Problems solved by technology

Except for these demonstrations that can be operated by hand, most of what students can see is the teaching film content of screen demonstrations, because the demonstrations that students can see and the descriptions in the textbooks cannot organically form a clear day, earth and month. Therefore, many high school graduates and even college graduates have vague knowledge of the operation of the sun, the earth, and the moon, and cannot clearly describe the formation of the four seasons and the causes of solar and lunar eclipses.

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