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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 Kerry Dark-Sky Group was created in 2013 after several out-reach meetings with local community groups in the Reserve at the request of attendees to the gatherings. The purpose of the Kerry Dark-Sky Group is to promote astro-tourism in the Reserve via community projects, local outreach, and events. [4] [dead link ]
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 ...
A dark sky place is exactly what it sounds like. Modern lighting in cities and towns contributes to light pollution, which obscures many stars from sight for those who live in urban environments.
With increasing urban lighting even in remote areas, finding that dark sky site is tough these days. Backyard Universe: Want to see a cool astronomical event? Head for a dark sky site.
Map of the Jizera Dark Sky Park. The Jizera region of dark skies covers an area of almost 75 square kilometres (29 sq mi). It is located in an nearly uninhabited part of the Jizera Mountains and lies halfway between the Czech and Polish sides of the mountain range.
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 night sky brightness in the reserve ranks at a level 2 on the nine-level Bortle Dark-Sky Scale, representing a truly dark site with high astronomical observability of celestial objects. [5] [6] The low level of light pollution in the area of the reserve has been supported by a lighting by-law that was included in the Mackenzie District Plan ...