An astrolabe-inspired watchface featuring a real-time astrological ephemeris. Features: - Zodiac wheel with all 12 signs and 10° tick marks - Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, and North Node positions calculated from JPL orbital elements - Exploded view: planet symbols orbit outside the ring with element-colored connecting lines (orange=Fire, green=Earth, yellow=Air, blue=Water) - Full moon phase visualization filling the center of the wheel - 75 real stars from the Hipparcos catalog plotted at their ecliptic coordinates - Essential dignity system: planet symbol brightness reflects astrological strength - Sign boundary indicator when the Sun approaches a new sign - Computation caching for battery efficiency - Supports both rectangular (emery) and round (gabbro) displays Astronomy: - Sun and Moon positions updated every minute - Inner planet positions every 5 minutes, outer planets every 10 - Retrograde detection every 30 minutes - Accuracy: ~0.5° for luminaries, ~1-3° for planets