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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 .
Location Area (in ha) Bortle Scale Status Notes Australia: The Jump-Up, Australian Age of Dinosaurs: Queensland: 1,400 1–2 Dark Sky Sanctuary Designated on April 27, 2019 Australia: Warrumbungle National Park: New South Wales: 23,312 1 Dark Sky Park Designated on July 4, 2016 Australia: Arkaroola Wilderness Sanctuary: South Australia: 63,000
The Bortle scale is a nine-level measuring system used to ... World map of light pollution. ... A simple method for estimating the darkness of a location is to look ...
In order to describe how much light pollution there is at a particular location, astronomers classify night skies based on the Bortle Scale.
When Globe at Night observations are averaged together, they are very strongly related to the sky brightness in the location. This is a single panel from this image . The standard deviation of an individual Globe at Night observation is approximately 1.2 stellar magnitudes. [ 2 ]
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 ...
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Amid growing anxieties surrounding reported drone sightings, the FBI has issued a warning against a new trend of pointing lasers at aircrafts.