sky brightness
1Sky 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… …
2sky 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 …
3Sky — 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… …
4sky 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 …
5Brightness 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 =… …
6Bortle 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… …
7International 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… …
8Night sky — For other uses, see Night sky (disambiguation). The Moon is the most common major object viewed in the night sky …
9Low 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… …
10National 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… …
