Since the 1960s, Tucson has been an important location for professional astronomical research, and the International Dark-Sky Association was established to protect the night sky from light pollution caused by Tucson’s steady growth - and Oracle State Park is a favorite viewing spot. Read more» 
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Look up at the sky once the sun goes down. How many stars do you see? If you live in a city or suburb, probably very few. That’s because of light pollution, the brightening of the night sky due to excessive use of lighting – something that the Tucson-based International Dark Sky Association has fought for nearly 30 years. Read more»
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