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The Observatory of the Vallée de Joux

To dream, to wonder, to discover, to learn, to experience, to discuss time, matter and the universe, manipulating the instruments and see with his own eyes. These are activities based on curiosity and enrich our lives.

The observatory at the Vallée de Joux is of a general interest by allowing the public, including the disabled, tourists and clients of manufactures. They will access an opened window on the universe and the beauty of the sky. Knowledge of celestial objects and viewing events will awake their interest in the cosmos and the "Big Questions". 

Instruments Telescopes and refractors: 
• LUNT refractor, 152 mm in diameter, only for solar observation. 
• Orion refractor, 120 mm in diameter, for observing the sun and the stars. 
• DOBSON telescopes, with mirrors 200 and 400 mm in diameter, for observing the sky, easily manipulated by children. 
• Celestron C8 Schmidt-Cassegrain telescope , with a mirror of 200 mm, for a more rigorous observation of the sky.
• Ritchey-Chretien telescope with a mirror of 610 mm, for deep sky observation.


Nights of observations: 
Friday and Saturday (from 2017 only on Saturday)

Sun observations: 
Saturday from 11.am to 12.30pm.

Nights adult CHF 25. - (30.- from 2017)
Sun adult CHF 10.- (15.- from 2017)
Children until 10 years old, free entrance
Information and reservations:
Vallée de Joux Tourisme 
+41 21 845 17 77

Geographic situation

Zoom map


La Capitaine
1347 Le Solliat


Practical information

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Online Booking



Vallée de Joux Tourisme, Centre Sportif - Rue de l'Orbe 8, 1347 Le Sentier, Suisse - Tél. +41 021 845 17 77 - Fax +41 021 845 50 08 - info@valleedejoux.ch 
Open Monday to Friday 9am to 6pm. Saturday and Sunday 9am to 12pm and 1pm to 6pm.
Copyright Vallée de Joux Tourisme 2009, Réalisation MySwitzerland & DidWeDo*