Most Blue Skies I + II is a computer generated installation that attempts to find “the bluest skies” in the world. The project measures the passage of light through particulate matter in the atmosphere, and calculates the exact colours of the sky at billions of places on earth. Using a complex system of satellite data acquisition and atmospheric simulations, the project continuously calculates the place on earth that has the bluest sky and visualises the best possible approximation to that colour, as well as the name of the place where you should stand to see that sky. Most Blue Skies I + II combine atmospheric research, environmental monitoring and sensing technologies with the romantic history of the blue sky and it’s fragile optimism, and addresses our changing relationship to the sky space as the subject for scientific and symbolic representation.