This is a toy- not exactly scientifically accurate or the most sturdy and we'll built- but it's more than sufficient. No issues so far, after two months. It’s more robust than i thought it would be.

Rocky planets rotate slightly faster than gas giants. Requires about 32” (est) free space to rotate but can be set as a stationary model. The planets revolve fine. My 11-year-old autistic grandson especially loves it.

Second time i will be returning it with full refund. Order this defective product at your peril. Seller sends same, opened, not-functioning items to those 10 silly people who bought the model.

The motors that rotate the two groups of planets are weirdly loud. If you attach the planets first then it is very difficult to install the batteries. A couple of times of attaching and removing them causes the socket to come loose. Never powered on.

Toy is being marketed as a stem learning toy for ages 8+. They're more likely to unlearn accurate information. I'm not sure what geological period it's trying to depict, but it ain't present day.