Live demo in https://pedrosbmartins.github.io/downtoearth (linked in the readme, but it was difficult to notice.)

There is a Solar System in model in Stockolm https://en.wikipedia.org/wiki/Sweden_Solar_System , perhaps you can add a button to use the same center and scale.

It would be nice to add the dwarf planets like Pluto. Everyone knows Pluto and Ceres, but the other ones need some exposition.