This model represents the relative movement of the sun,the earth,and the moon,used in teaching
to demonstrate the relation among the relative movement of the three celcstial bodies,thereby
ilucidating such natural phenomena as the originatiou of days and nights,seasons,and climatic
zones,likewise solar and lunar eclipses as well as the changing phases of the moon.
In this model,the sun can light,and the light is drived by dry batteries.And the Earth-moon can revolve around the sun and self-rotate,drived by dry batteries or man'hand .Also,the moon will revolve around the earth while the earch revolve around the sun.
metal base's diameter:16.2cm
How to use it:
This Sun-Earth-Moon movement model can be drived by electricity.the sun
can be lighted.
The sun need two #5 batteries,so does the speed controler.
The price is low,so you can not expect it's good as an orrery of more than hundreds dollars.
we welcome wholesalers to contact us.