From the stars to atoms and the history of timekeeping and precision watchmaking
10 July 2026
The Observatory of Neuchâtel (l’Observatoire cantonal de Neuchâtel) has long been at the heart of watchmaking certification and chronometry competitions. Today, the Cantonal Observatory of Neuchâtel is a cultural and scientific heritage, dedicated to its role in the history of timekeeping and precision watchmaking.
The Observatory of Neuchâtel
For a long time, only observing the sky made it possible to verify a clock’s accuracy. This relationship is reflected both in watchmakers’ practices and in educational systems and local initiatives that sought to structure the measurement of time. Astronomy thus became a major scientific reference, serving an industry in search of reliability and recognition.
The Observatory’s foundation responded to the need to professionalise timekeeping, control chronometers, and strengthen the competitiveness of Neuchâtel watchmaking in international competition. Certifications, regulations, technical instruments and rating certificates (bulletins de marche) bear witness to the gradual establishment of a genuine economy of quality.
The chronometry competitions occupied an essential place in this framework. They made it possible to attest to the excellence of products, to showcase the know-how of precision adjusters, and to feed a prestige widely exploited by watchmaking communication.
The Musée international d’horlogerie de La Chaux-de-Fonds, telescope of the Observatory of Neuchâtel
The end of the competitions at the Observatory does not mark the disappearance of the demand for precision, but its transformation. That demand continues today through institutions such as the Contrôle Officiel Suisse des Chronomètres (COSC) and METAS, which inscribe the Neuchâtel legacy within current standards and renewed perspectives on timekeeping.
Christiaan Huygens (seated left) among other scholars of his time. Wallpainting Musée International d’Horlogerie
The exhibition Des étoiles aux atomes
Through a programme spread over four sites and an associated programme, the project invites visitors to explore the various ways time has been observed, measured, preserved and shared — from astronomical practices to contemporary atomic technologies.
Collection of ancient sundials. Musée international d’horlogerie de La Chaux-de-Fonds.
Following this chronological and conceptual thread, the exhibition Des étoiles aux atomes highlights the close links between the observation of the sky and of atoms, scientific instrumentation and the development of precision watchmaking, as well as the social and scientific uses of measured time.
The exhibition highlights the emergence of a culture of precision in the Neuchâtel Mountains, as well as the Observatory’s role in certifying watchmaking products and organising the chronometry competitions. These missions are placed within a broader history at the crossroads of navigation, astronomy and the watch industry.
Le Musée international d’horlogerie de La Chaux-de-Fonds, equipment for the femtosecond
The exhibition, organised by the Automates & Merveilles Association, offers a chronological and thematic journey through the history of precision watchmaking, showing how it was built at the intersection of scientific challenges, economic stakes and institutional choices.
It opens on the origins of this culture of precision, marked as early as the 18th century by the quest for longitude at sea. The demands of long-distance navigation stimulated the development of marine chronometry and encouraged watchmakers of the Jura Arc, and especially of the Montagnes neuchâteloises, to perfect their instruments.
Conceived as a coherent whole, the exhibition unfolds across four locations with self-contained chapters, each approaching timekeeping from its own angle. Visiting the four sites makes it possible to connect these approaches and understand how, over the centuries, time has been observed, measured and transmitted — from the sky to the most precise instruments.
The four locations are: Musée international d’horlogerie in La Chaux-de-Fonds, Musée d’horlogerie du Locle — Château des Monts, Musée d’art et d’histoire de Neuchâtel, and l’Observatoire cantonal de Neuchâtel.
(Source and further information: l’Association Automates & Merveilles)
Pictures: Sternewarte St. Margarethen in Binningen (Canton Basel-Landschaft)