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  2. Sky quality meter - Wikipedia

    en.wikipedia.org/wiki/Sky_Quality_Meter

    Sky Quality Meter model SQM-L. A sky quality meter (SQM) is an instrument used to measure the luminance of the night sky, more specifically the Night Sky Brightness (NSB) at the zenith, with a bandwidth ranging from 390 nm to 600 nm. [1]

  3. Bortle scale - Wikipedia

    en.wikipedia.org/wiki/Bortle_scale

    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 .

  4. SQM - Wikipedia

    en.wikipedia.org/wiki/SQM

    Sky quality meter, an instrument for measuring the luminance of the night sky; Supersymmetric quantum mechanics, in theoretical physics; Computing.

  5. Skyglow - Wikipedia

    en.wikipedia.org/wiki/Skyglow

    Skyglow (or sky glow) is the diffuse luminance of the night sky, apart from discrete light sources such as the Moon and visible individual stars. It is a commonly noticed aspect of light pollution . While usually referring to luminance arising from artificial lighting , skyglow may also involve any scattered light seen at night, including ...

  6. Talk:Bortle scale - Wikipedia

    en.wikipedia.org/wiki/Talk:Bortle_scale

    Anyone know the relationship between Bortle and Sky Quality Meter (SQM) which measures in mag/arcsec 2?--Chuunen Baka (talk • contribs) 12:23, 16 October 2012 (UTC) []The whole question of a standardised, objective methodology for assessing sky quality (darkness) remains an unresolved one.

  7. Globe at Night - Wikipedia

    en.wikipedia.org/wiki/GLOBE_at_Night

    The size of the project (in terms of number of observations) expanded dramatically in that year. In 2014, the project expanded to also include data obtained via the Loss of the Night app for Android devices, and the Dark Sky Meter app for iOS devices. In addition, new star charts were added to extend the standard map based campaign throughout ...

  8. Glossary of astronomy - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_astronomy

    A-type star In the Harvard spectral classification system, a class of main-sequence star having spectra dominated by Balmer absorption lines of hydrogen. Stars of spectral class A are typically blue-white or white in color, measure between 1.4 and 2.1 times the mass of the Sun, and have surface temperatures of 7,600–10,000 kelvin.

  9. Roblox - Wikipedia

    en.wikipedia.org/wiki/ROBLOX

    Roblox occasionally hosts real-life and virtual events. They have in the past hosted events such as BloxCon, which was a convention for ordinary players on the platform. [45] Roblox operates annual Easter egg hunts [51] and also hosts an annual event called the "Bloxy Awards", an awards ceremony that also functions as a fundraiser. The 2020 ...