night sky radiation

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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 — 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 Captain and the World of Tomorrow — Infobox Film name = Sky Captain and the World of Tomorrow image size = caption = Theatrical poster director = Kerry Conran producer = Jon Avnet Sadie Frost Jude Law Marsha Oglesby writer = Kerry Conran starring = Gwyneth Paltrow Jude Law Giovanni …   Wikipedia

• electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… …   Universalium

• Discovery of cosmic microwave background radiation — Bell Labs Horn Antenna in Crawford Hill, NJ In 1965 while using the Horn Antenna, Penzias and Wilson stumbled on the microwave background radiation that permeates the universe. This article concerns the accidental discovery of cosmic microwave… …   Wikipedia

• Cities of the Red Night — by William S. Burroughs (1981)    This first book in a trilogy of novels was published in the 1980s that also includes The place of dead roads and The western lands. Although written late in William S. Burroughs’s life, these three novels are… …   Encyclopedia of Beat Literature

• cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

• Olbers' paradox — in action In astrophysics and physical cosmology, Olbers paradox is the argument that the darkness of the night sky conflicts with the assumption of an infinite and eternal static universe. It is one of the pieces of evidence for a non static… …   Wikipedia

• Light pollution — This article is about light pollution in the visible spectrum. For information on pollution in the radio spectrum, see radio spectrum pollution. This time exposure photo of New York City at night shows skyglow, one form of light pollution …   Wikipedia

• Star — For other uses, see Star (disambiguation) …   Wikipedia

• Galaxy — This article is about the astronomical structure. For other uses, see Galaxy (disambiguation). NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light years in diameter and approximately 60 million light… …   Wikipedia