Astronomical Astrolabe Orbital Bird Feeder

Begin by crafting three concentric rings out of bent laminations of flexible walnut or ash wood. These rings are designed to rotate freely on a central stainless steel axle to mimic an ancient armillary sphere.

Mount a small, clear acrylic hopper at the core of the inner ring to store seed, ensuring it remains balanced at the center of gravity. This central chamber is protected by the orbiting outer rings, which act as a baffle against rain and strong gusts.

Incorporate small brass tension bolts at each pivot point to ensure smooth, low-friction rotation of the wooden rings. Precision drilling is essential to keep the orbits aligned and prevents the feeder from binding during operation.

Apply a marine-grade exterior oil finish to protect the intricate wood grain from moisture while highlighting the contrast of the brass hardware. Suspend the finished unit with a swivel hook to allow the entire mechanism to drift and rotate naturally with the wind.