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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.
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.
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 ...
International Dark Sky Week (formerly the National Dark Sky Week) is held during the week of the new moon in April, [1] [2] when people worldwide may turn off their lights to observe the beauty of the night sky without light pollution. This event was founded in 2003 by high school student Jennifer Barlow of Midlothian, Virginia. [3]
The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky's brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution .
The Central Idaho Dark Sky Reserve is a 1,416-square-mile (3,670 km 2) dark-sky preserve near the Sawtooth National Recreation Area, in the U.S. state of Idaho. It was designated on December 18, 2017, and is the first gold-tier dark sky preserve in the United States. [2] [3] [4] The area was designated by International Dark-Sky Association.
The Jizera Dark Sky Park (Polish: Izerski Park Ciemnego Nieba - IPCN, Czech: Jizerská oblast tmavé oblohy - JOTO) is the first transnational dark-sky preserve. It is located in a nearly-uninhabited region of the Jizera Mountains that lies halfway between Poland and the Czech Republic .
The Aoraki Mackenzie International Dark Sky Reserve is an area of 4,367 km 2 (1,686 sq mi) that was designated as an International Dark Sky Reserve by the International Dark-Sky Association in June 2012. The reserve is located in the Mackenzie District in the South Island of New Zealand. At the time of the designation in 2012, the reserve was ...