I made planets out of wood, hand turned on a wood lathe. They are suspended from the ceiling as a sort of 'mobile' and driven by a single motor. The single motor, coupled with the dynamics of the system, creates complex and ever-changing patterns in the orbits of the planets.
On the wall is a photograph of an astronaut on the first untethered space walk (untethered, meaning not attached to a cable), that I've had since 1996.
Photos by Christine Saalfeld