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Sky brightness refers to the visual perception of the sky and how it scatters and diffuses light. The fact that the sky is not completely dark at night...

horizon, the sky generally attains its minimum brightness. Several sources can be identified as the source of the intrinsic brightness of the sky, namely airglow...

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...

Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception...

often used as an overall indicator of sky brightness, in that light polluted and humid areas generally have brighter limiting magnitudes than remote desert...

integrated measures such as the brightness of the "light dome" over a city, or the integrated brightness of the entire night sky. At very large distances (over...

night sky is one piece of evidence for a dynamic universe, such as the Big Bang model. That model explains the observed non-uniformity of brightness by invoking...

local atmospheric transparency, 40 times brighter than the darkest sky. In densely populated areas a sky brightness of 17 magnitude/sq. an arcsecond is not...

use polarization to distinguish sky brightness from the image of the corona: both coronal light and sky brightness are scattered sunlight and have similar...

In astronomy, surface brightness (SB) quantifies the apparent brightness or flux density per unit angular area of a spatially extended object such as a...

logarithmic: the brighter an object is, the lower its magnitude number. A difference of 1.0 in magnitude corresponds to a brightness ratio of 100 5 {\displaystyle...

The Legend of Heroes: Trails in the Sky is a 2004 role-playing video game developed by Nihon Falcom. The game is the first in what later became known...

(Na), and lithium (Li). The sky brightness is typically measured in units of apparent magnitude per square arcsecond of sky. In order to calculate the...

constellations. The area of sky that the Milky Way obscures is called the Zone of Avoidance. The Milky Way has a relatively low surface brightness. Its visibility...

horizon, the sky generally attains its minimum brightness. Several sources can be identified as the source of the intrinsic brightness of the sky, namely airglow...

features of bright objects, especially Moon and planets. These filters have no effect on observing faint objects. Red: Reduces sky brightness, particularly...

methane, moving across Titan, using the James Webb Space Telescope. Sky brightness and viewing conditions are expected to be quite different from Earth...

arranged by their apparent magnitude – their brightness as observed from Earth. It includes all stars brighter than magnitude +2.50 in visible light, measured...

of a two-week span of dates near the new moon removes any effect on sky brightness from scattered moonlight, and observing well after sunset prevents any...

Coloradoan. Pipkin, Ashley. "Measuring the color and brightness of artificial sky glow from cities using an all-sky imaging system calibrated with astronomical...