Rotating desktop solar system model. A hands-on orrery for classrooms, kids' desks and science shelves. The engraved base plate marks the nine orbits, while ten celestial blocks - Sun, eight planets and Pluto - sit on arms that pivot around the central column, so each planet can be swung along its own orbit and named in place.

One post, ten orbits. Ten orbit arms stack on one central post, so each planet swings independently around the Sun. Rotate an arm and its dome traces the engraved ring it belongs to, letting you set the whole system to any arrangement you like.

Three parts, ten worlds. This set is built from three part types: a base plate, orbit arms and celestial blocks. Ten blocks represent the Sun, eight planets and Pluto, each a domed cap nestled in a ring collar at the arm's tip. Each piece is finished in its own color for instant identification.