Description: The very first interplanetary calendar, the Areannum (for Mars) included the first interplanetary clock, the Areochronum, as well, but it wasn't until much later that rotary chronometers were designed, by Will Napoli, the inventor of interchronometry (the
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The very first interplanetary calendar, the Areannum (for Mars) included the first interplanetary clock, the Areochronum , as well, but it wasn't until much later that rotary chronometers were designed, by Will Napoli, the inventor of interchronometry (the science of timekeeping on multiple worlds). Of course, the first of these was the Areochronometer . There are now more than one Areochronometer design and other designs for other worlds.
Planets, dwarf planets, proto-planets, asteroids, and comets that have interplanetary calendars also have interplanetary clocks, but any of these bodies may have moons as well and each moon requires its own interplanetar clock. Some worlds can share the same chronometer design. Actual, physical chronometers are being developed now. Look for them soon.