Heaven and Earth.

A map-based clock concept that accurately tracks the movements of the Sun, Moon and planets on the celestial sphere, and Earth's daily counterclockwise rotation on its axis.

The result is a clock face where we can tell what time it is everywhere on Earth at once and find all celestial objects in the sky. It can even be used as a rough compass, to find the cardinal directions.

It takes a bit of explanation to fully understand how to read it, but the reward is astronomical.

Time is space.

Noon is defined as the top of the clock, but since the Earth orbits around the Sun, the Sun appears to travel around the celestial sphere, along the imaginary line we call the ecliptic circle. To adjust for this and keep the Sun at the top of the clock, the whole sky map is rotated the opposite direction once per year.

Full, visualized explanations of all clock conventions and all relevant astronomy concepts.