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DarkSky International, formerly the International Dark-Sky Association (IDA), [1] is a United States–based non-profit organization incorporated in 1988 by founders David Crawford, a professional astronomer, and Tim Hunter, a physician and amateur astronomer.
MPI Home Video logo from 1999. MPI Media Group is an American producer, distributor and licensor of theatrical film and home entertainment. MPI's subsidiaries include MPI Pictures, MPI Home Video, Gorgon Video, and the horror film distributor Dark Sky Films.
Philip's, in association with the BAA Campaign for Dark Skies, Dark Skies Map, Philip's, 2004. (ISBN 0-540-08612-6) Tabb, Michael, "Where are the UK's darkest skies", Astronomy Now, November 2004. pp75–6 (Article on the production of the Philip's Dark Skies Map.) Various authors, "Focus - Light Pollution", Astronomy Now, April 2001. pp49–59
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A dark-sky preserve status enables high-quality astronomical observation in Paranal Observatory. [1] A dark-sky preserve (DSP) is an area, usually surrounding a park or observatory, that restricts or reduces light pollution or maintains and protects naturally dark night skies. Different terms have been used to describe these areas as national ...
For the Wairarapa reserve, the dark core is the entire area of the Aorangi Forest Park in the south of the reserve. [2] All measurements of night sky luminance in the core area are darker than 21.3 mag/arcsec 2 (corresponding to Bortle scale 3), and in places are as dark as 21.8 mag/arcsec 2 (Bortle scale 1).
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The dark-sky movement is a campaign to reduce light pollution.The advantages of reducing light pollution include an increased number of stars visible at night, reducing the effects of electric lighting on the environment, improving the well-being, [1] health [2] and safety [3] of people and wildlife, [4] and cutting down on energy usage.