Sun Earth Moon Orbital Model with Light, Kids Solar System Model Astronomical Science Educational Kits

Directions:1. Put the sun’s metal post in the center hole and the long metal wire in the red arrow.2. Put the two nuts in the holes (opposite end of the handle)3. Put one black gear on the end of the post on the Earth diagram.4. Hold the two diagrams together. Put the screws in coming up from the bottom. This is tricky. Try not to turn it upside down when you do this.5. Put the last black gear on the post under the screws you just screwed in.6. Hold the gear in place with the black peg.* double check it all works before you put in the black peg or it will be a pain to take it apart again.

No directions what so ever with the productNo instruction how to align the objectsNever experienced anything like that

I love this model! I ordered it to help my 5th graders understand the difference between Earth's rotation and revolution around the sun, as well as how Earth's movement affects the seasons. They had such a better understanding after using this model. It was also incredibly easy to put together and feels nice and sturdy. The 6th grade teacher has already asked me to borrow it to help with her unit on the phases on the moon (the phases will shine onto the wall when the sun is turned on). I definitely recommend this model!

I bought this product to use in my middle school science classroom. Once assembled, it rotates nicely for me and demonstrates both the phases of the moon and the seasons of the sun-earth-moon system. I had some difficulties putting it together, however. The screws are tricky to put in as they are super short, and I actually had to disassemble and reassemble the whole system because I didn't make sure the seasons were properly aligned when I first put the gears on. The sun's wire also seemed too long at first, but if I put the metal pole in and then the sun in the center, it bent to fit correctly without any other tools. Overall, if you make sure you align everything correctly when assembling the first time and can manage with the shorter screws, I think this will definitely be worth it and a useful model in my classroom.

There were NO instructions on how to assemble especially how to calibrate the moon/earth cycle with the sun. Was NOT able to contact MFG for instructions - no information on how to do so. Furthermore, the light from "the sun" was poorly aligned onto the earth and found no way to adjust.

I bought this orrery for my 11 year old grandson as a Christmas gift. It is a fantastic teaching device. If you are looking for a high-precision machined mechanism, this isn't it, but it is nicely designed, colorful and does what it needs to for educating one on the movement of the earth and moon in the solar system. It will demonstrate sunrise, sunset, and the seasons of the year. A little interpretation will suffice to explain the monthly change of the moon from full to zero. Even eclipses. Fun for everyone 8 to 80. Worth the price! Get one!

As George E. P. Box said "All models are wrong, some are useful." The easy to assemble model mechanically demonstrates the motions of the Earth/Moon systems orbit around the sun nicely with the exception of a lunar orbital tilt. A tilt would be more accurate but actually may demonstrating eclipses harder. Its a little pricey for what it is but its all you need for understanding the basic motions of the solar system. Its labeled with Chinese traditional seasons and astrological signs which seems odd to a westerner but it's just another thing for a those interested to investigate.I like the device. Sure there's a lunar and solar eclipse every "month" because it's mechanically simpler but that offers an opportunity to explain why they don't happen that way in reality.It's not obvious in the description but there's a detented on/off pushbutton on back the "Sun" that illuminates an LED aimed at the "earth". This allows the Earth or Moon to "eclipse" the light from the Sun casting a shadows on each other. Neat.

If I could write 0 I would. Horrible quality and doesn’t really work. First one came broken.