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It is one of the purest skies in the world. Far from the pollution of cities, an observation station in the Aosta Valley (Italy) allows you to contemplate the starry nights. A rare spectacle that delights young and old.
TO the time when 50% of EEuropeans are deprived of the Milky Way and its thousands of stars, the spectacle is breathtaking. Dn the Aosta Valley (Italy), hundreds of enthusiasts come to enjoy one of the purest skies in the world according to Unesco. Located at an altitude of 1,700 meters, this observation station is far from the parasitic lights of the city.
For astronomers, city lighting needs to be completely rethought to regain the beauty of the sky. “Many street lights illuminate in all directions in 360 degrees and create halos of light. Half of this light is sent upwards, it dazzles us, it is wasted and we pay for nothing“, deplores Andrea Berganozzi, astronomer. TO Due to lights and atmospheric pollution, certain missions, for example the surveillance of asteroids, have been relocated to the heart of the Alps. “Our sky quality is very good, the nights when we can observe the sky are numerous“, explains Jean-Marc Christille, director of the astronomical observatory of Saint-Barthélemy (Italy). On average, the Mont-Blanc sky is clear 250 days a year.