Planet Orrery with shining Sun (MOD)




Modification of this Planet Orrery:

Orrery simulates:
1, Sun rotation,
2, Earth orbit,
3, Earth rotation,
4, tilt of Earth axis
5, Moon orbit,
6, Moon rotation.

A rotating Sun can be used to show rotation of Sun. A shining Sun can be
used to show phases of moon, illumination of Earth during seasons, polar
day/night, lunar or solar eclipse.
Either motor or hand can be used to rotate orrery.
Model deficiencies: Moon eclipse comes every single orbit of moon due to
limited size of the model. New moon always cause solar eclipse due to limited
size of the model. Sun rotation is independent on latitude.
Orrery was modeled by Ryu Wakimoto. and modified by KaeroDot.
Modifications are: removed cover of the stand to show internal gears,
added shining Sun and other small changes.

All source files are at:
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Name Planet Orrery with shining Sun (MOD)
Designer Kaero
Designed 2017
Inventory 982 parts
Theme Technic
Modification of MOC-9044 Planet Orrery


  • 7 months, 3 weeks ago theOPBOB Level 3
    Hello Kaero,
    so I'm building a orrery right now and  I wanna know, if in your model the arm with Earth is a little too heavy and all of the build is dont want to run smoothly?
    • 7 months, 3 weeks ago Kaero Level 9 Designed this MOC
      Hi. The arm is slightly tilted, but not much. The tilt does not cause increased friction. There is of course friction caused by all the gears, however even an infant can run it easily.
  • 1 year, 8 months ago Borghy Level 7
    Very very beautifull MOC.
    Only one question: with the parts list, can I build one or two "sun"?

    • 1 year, 8 months ago Kaero Level 9 Designed this MOC
      Two suns. Take a look at the Building Instructions.
  • 1 year, 11 months ago Samy405 Level 15
    Nice MOC, but EARTH IS FLAT. :D
    • 1 year, 11 months ago Kaero Level 9 Designed this MOC
      as one can see on the MOC, earth is piecewise flat, i.e. every stud is flat, but the ball is rolling :)
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Help Guide - BI File Types

This MOC also has a 3D digital file available (eg LDD, MPD, etc): 3D Model