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If you're planning on sticking around for longer—a lot longer—than a standard human lifespan, you'll need a watch that keeps time on the galactic level. Van Cleef & Arpels' new Complication Poétique Midnight Planétariumwill certainly fit the bill. Instead of hands denoting the hours and minutes, it incorporates six of our solar system's planets rotating a tiny version of the sun in real time. 

So while Mercury will make a lap around the watch's face in just 88 days, Venus will require 224, and Earth of course does it in exactly a year. Saturn, on the other hand, the farthest planet from the sun included on this piece, won't make it back to its starting position for a whopping 29 and a half years. 

With 396 tiny parts working together to complete the watch's tiny movement, the Midnight Planétarium of course doesn't come cheap. But it's the fact that each of the planets are actually tiny precious and semi-precious gemstones that really contribute to its price tag. Available sometime later in the year, you'll thankfully still have a few months to save up for this $245,000 piece. [Van Cleef & Arpels via Cool Hunting]