We've seen some far-out personal astronomy devices, but this mechanical "planetarium" from Richard Mille is also one of the most intricate pieces of clockwork we've ever come across. The model, which took 10 years to develop, displays the time, date, signs of the zodiac, phases of the moon, and relative placement of the planets in the solar system, and runs for 15 days once its spring windings are fully tightened. No word on price, but since Mille handbuilt just one of these, we're guessing "not cheap" would be a strong first guess.

[Via Watch Luxus]

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