The breeze from the trade winds and the thermal inversion they produce, prevent the formation of clouds. This is why the skies of the Canary Islands are clearest and brightest in Europe.
Besides they are protected by the Law on the Protection of the Atmospheric Quality of the Institute of Astrophysics of the Canary Islands,which controls light and radio-electric pollution, atmospheric contamination and regulates air traffic so that nothing can interfere with the observation of the stars.
The breeze from the trade winds and the thermal inversion they produce, prevent the formation of clouds. This is why the skies of the Canary Islands are clearest and brightest in Europe. Besides they are protected by the Law on the Protection of the Atmospheric Quality of the Institute of Astrophysics of the Canary Islands,which controls light and radio-electric pollution, atmospheric contamination and regulates air traffic so that nothing can interfere with the observation of the stars.
For these reasons, the Canary archipelago is regarded as one of the best places in the world to observe the stars and it has the most important Astrophysical observatories in the northern hemisphere.