The Tidewatcher's Orrery
Alignment rings puzzle
Easy
By
Bookwyrm
Three brass rings of constellations, geared to turn the tide.
A brass orrery stands on a plinth of wet stone. Three rings of engraved constellations circle a dark lens, and each ring carries a single notched star. A tiny brass gear bridges the inner ring to the middle one.
The rings turn stiffly under your fingers, each notch a satisfying click.