TUCSON, Arizona, Sept. 4 -- DarkSky International issued the following news release: After an extensive application and rigorous certification process, Tubac has earned the prestigious designation as Arizona's newest International Dark Sky Community. This accolade places Tubac among an elite group of only 48 communities worldwide that have achieved this certification. Arizona, home to the certifying non-profit DarkSky International, now features six International Dark Sky Communities, further c  more