A Tale of Two Regions: Site Protection Experience and Updated Regulations in Arizona and the Canary Islands

Some of the world’s largest telescopes and largest concentrations of telescopes are on sites in Arizona and the Canary Islands. Active site protection efforts are underway in both regions; the common challenge is getting out ahead of the LED revolution in outdoor lighting. We review the work with local, regional, and national government bodies, with many successful updates of outdoor lighting codes. A successful statewide conference was held in Arizona to raise awareness of public officials about issues of light pollution for astronomy, safety, wildlife, and public health. We also highlight interactions with key entities near critical sites, including mines and prisons, leading to upgrades of their lighting to more astronomy-friendly form. We describe ongoing and planned sky monitoring efforts, noting their importance in quantifying the “impact on astronomy” increasingly requested by regulators.

Richard Green

AUTHORS/INSTITUTIONS: R.F. Green, Steward Observatory, University of Arizona, Tucson, Arizona, UNITED STATESL. Allen, Kitt Peak National Observatory, National Optical Astronomy Observatory, Tucson, Arizona, UNITED STATESE. Alvarez del Castillo, AdC Consultants, Tucson, Arizona, UNITED STATESJ. Diaz Castro, Oficina Tecnica para la Protección de la Calidad del Cielo, Instituto de Astrofisica de Canarias, Tenerife, SPAINC.J. Corbally, P. Gabor, Vatican Observatory, Tucson, Arizona, UNITED STATESD. Davis, Planetary Sciences Institute, Tucson, Arizona, UNITED STATESE. Falco, Fred Lawrence Whipple Observatory, Smithsonian Astrophysical Observatory, Amado, Arizona, UNITED STATESJ.C. Hall, Lowell Observatory, Flagstaff, Arizona, UNITED STATESC.K. Monrad, Monrad Engineering, Tucson, Arizona, UNITED STATESG. Williams, MMT Observatory, Tucson, Arizona, UNITED STATES


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