At night, in the Vallée de Joux, the sky is so clear that we can easily observe celestial events.

Our watchmakers have mastered all forms of astronomical complication, from simple to highly complex perpetual calendars, equation of time, sky charts, and moon cycles, and have managed to combine them with other complications.

Jaeger-LeCoultre has invented and patented entirely new celestial complications, including the Shooting Star and the Cosmotourbillon, an orbital flying tourbillon that makes a complete circuit of the dial in one sidereal day.