Planetario di Lignan

The mountain hamlet of Lignan is home to two astronomical institutions. At Lignan di Saint-Barthélemy the Planetarium is the indoor counterpart of the regional observatory: a domed theatre where projected skies make astronomy accessible in varied conditions.

Why it matters

The planetarium is run by the Fondazione Clément Fillietroz, the same public foundation that manages the Aosta Valley Astronomical Observatory. The planetarium complements the observatory's research with public education in the high-altitude Starlight Stellar Park of the Aosta Valley.

What to notice

The dome experience differs fundamentally from looking through a telescope: instead of one object at a time, the projected sky can be sped up, tilted, travelled through and cloudless on demand. Shows place the audience under a simulated firmament at Lignan's latitude, connecting the presentation to the local night sky. The planetarium and observatory operate under one foundation, linking public education with astronomical research.

Context and history

The planetarium grew out of the same institutional arc as the observatory. Behind the planetarium stands the Fondazione Clément Fillietroz, set up by public deed on 24 May 2003 to run the regional observatory. Its mandate spans research, technology transfer and public education, and its public funding comes from the Autonomous Region of Aosta Valley, joined by the Municipality of Nus and by the Unité des Communes Valdôtaines Mont-Emilius. A dome theatre was added at Lignan as a weatherproof, daytime venue for public education. The planetarium and observatory share the high-altitude site at Lignan.