night sky brightness

Mira otros diccionarios:

• 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

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

• 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

• night — 1. noun /naɪt/ a) The period between sunset and sunrise, when a location faces far away from the sun, thus when the sky is dark. a night on the town b) An evening or night spent at a particular activity. We stayed at the Hilton for five nights.… …   Wiktionary

• 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

• 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

• Sloan Digital Sky Survey — The Sloan Digital Sky Survey or SDSS is a major multi filter imaging and spectroscopic redshift survey using a dedicated 2.5 m wide angle optical telescope at Apache Point Observatory in New Mexico. The project was named after the Alfred P. Sloan …   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