If you want to keep an eye on our planet and everything that is going on around it, you might consider this Richard Mille Planetarium-Tellurium. It features the rotation of Earth and those of the moon, Mercury, Venus, and the sun. It has year, month, day, hour and minute indications with its perpetual calendar, and will display the seasons, equinoxes, solstices, and zodiac signs. Made of titanium, steel, brass, gold, silver, and red corundum, this is a one of a kind device with its asking price in seven figures, but you can catch it on display next month at the Temple of Time in Singapore if you happen to be going that way.

(Thanks, Mitch)