Customizable Nocturnal

thingiverse

A nocturnal, also known as a star dial, is an analog computer used for telling the time using the relative positions of stars in the night sky. Reference stars: Pointer stars of Ursa Major Kochab of Ursa Minor Shedar of Cassiopeia To operate: Spot one of the reference stars and align the relevant constellation on the inner ring with the current date on the outer ring. Sight the North star (Polaris) trough the center hole With the handle pointing down, align the Pointer with the chosen reference star The Pointer now intersects the current time on the inner ring! NB - The customizer app seems to return an error while rendering the more complex components (Inner and Outer Rings), I'm looking into this problem but for now I have uploaded STLs for the 'Spiral' style nocturnal, and you can still customize by downloading the OpenSCAD file.