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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 .
Old School RuneScape is a massively multiplayer online role-playing game (MMORPG), developed and published by Jagex.The game was released on 16 February 2013. When Old School RuneScape launched, it began as an August 2007 version of the game RuneScape, which was highly popular prior to the launch of RuneScape 3.
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.
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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Old School RuneScape is a separate incarnation of RuneScape released on 22 February 2013, based on a copy of the game from August 2007. It was opened to paying subscribers after a poll to determine the level of support for releasing this game passed 50,000 votes (totaling 449,351 votes [ 39 ] ), followed by a free-to-play version on 19 February ...
Dark Sun Boxed Set (1st boxset). TSR, Inc. ISBN 1-56076-104-0. Timothy Brown (June 1992). Dark Sun: Dragon Kings. TSR, Inc. ISBN 1-56076-235-7. Bill Slavicsek (October 1995). Dark Sun Campaign Setting, Expanded and Revised (2nd boxset). TSR, Inc. ISBN 0-7869-0162-4. Accessories. Walter Baas (March 1992). Terrors of the Desert (Dark Sun ...
The term Digitized Sky Survey originally referred to the publication in 1994 of a digital version of an all-sky photographic atlas used to produce the first version of the Guide Star Catalog. [1] [2] For the northern sky, the National Geographic Society – Palomar Observatory Sky Survey E-band (red, named after the Eastman Kodak IIIa-E ...