Earth, Moon, And Sun Direction Mechanical Orrery (V1) 3D Printer Model

License: CC BY
File formats: STL,stl
Download type: zip
Size:14.3MB

The file 'Earth, Moon, And Sun Direction Mechanical Orrery (V1) 3D Printer Model' is (STL,stl) file type, size is 14.3MB.

Summary

Watch an animation of it in action here!

This desktop orrery accurately simulates several elements of the Earth, Moon, Sun system. More specifically:

  • For every 27.43 rotations of the Earth, the Moon completes one rotation
  • The Earth is properly inclined at a ~23° angle
  • The scale of the Earth (at 6cm) and of the Moon (at 1.5 cm) is accurate
  • For every year, the Sun-direction indicator completes one full revolution (indicated by red arrow)
  • The Earth, Moon, and Sun all rotate/revolve in the proper direction

The gears used are 10T, 14T, 60T, and 64T along with a three miter gears, and a 1T gear driving an 80T gear to indicate the sun direction. Additionally, there's a one-to-one rubber band link required to drive the Earth.

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