sky brightness

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• Sky brightness — This article is primarily about the brightness of the night sky. For daytime situations, please see Diffuse sky radiation and Rayleigh Scattering. The fact that the sky isn t absolutely dark at night can easily be observed. Were the sky (in the… …   Wikipedia

• sky brightness — dangaus skaistis statusas T sritis radioelektronika atitikmenys: angl. sky brightness; sky luminance vok. Himmelleuchtdichte, f rus. яркость неба, f pranc. luminance du ciel, f …   Radioelektronikos terminų žodynas

• Sky — The sky is the part of the atmosphere or of outer space visible from the surface of any astronomical object. It is difficult to define precisely for several reasons. During daylight, the sky of Earth has the appearance of a deep blue surface… …   Wikipedia

• sky luminance — dangaus skaistis statusas T sritis radioelektronika atitikmenys: angl. sky brightness; sky luminance vok. Himmelleuchtdichte, f rus. яркость неба, f pranc. luminance du ciel, f …   Radioelektronikos terminų žodynas

• Brightness Reef — infobox Book | name = Brightness Reef title orig = translator = image caption = Cover of first edition (hardcover) author = David Brin illustrator = cover artist = country = United States language = English series = Uplift Universe genre =… …   Wikipedia

• Bortle Dark-Sky Scale — The Bortle Dark Sky Scale is a nine level numeric measure of the night sky brightness of a particular location. It quantifies the observability of astronomical objects and the interference caused by light pollution and skyglow. John E. Bortle… …   Wikipedia

• International Dark-Sky Association — The IDA s logo The International Dark Sky Association (IDA) is a U.S. based non profit organization incorporated in 1988 by founders Dr. David Crawford, a professional astronomer, and Dr. Timothy Hunter, a medical doctor/amateur astronomer. The… …   Wikipedia

• Night sky — For other uses, see Night sky (disambiguation). The Moon is the most common major object viewed in the night sky …   Wikipedia

• Low surface brightness galaxy — A low surface brightness galaxy or LSB galaxy is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.Most LSBs are dwarf galaxies, in which most of their baryonic… …   Wikipedia

• National Geographic Society - Palomar Observatory Sky Survey — The National Geographic Society Palomar Observatory Sky Survey (NGS POSS) [A. G. Wilson, Trans. I.A.U. 8, 335–336 (1952); [http://adsabs.harvard.edu/abs/1963bad..book..481M R. L. Minkowski G. O. Abell, in Basic Astronomical Data: Stars and… …   Wikipedia

• All Sky Automated Survey — The All Sky Automated Survey (ASAS) is a Polish project implemented on 7 April 1997 to do photometric monitoring of approximately 10 million stars brighter than 14 magnitude all over the sky. The automatic telescope discovered two new comets in… …   Wikipedia