The luminosity

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• Luminosity — has different meanings in several different fields of science.In photometry and color imagingIn photometry, luminosity is sometimes incorrectly used to refer to luminance, which is the density of luminous intensity in a given direction. The SI… …   Wikipedia

• Luminosity function — The luminosity function or luminous efficiency function describes the average sensitivity of the human eye to light of different wavelengths. It should not be considered perfectly accurate in every case, but it is a very good representation of… …   Wikipedia

• Luminosity distance — DL is defined in terms of the relationship between the absolute magnitude M and apparent magnitude m of an astronomical object.: M = m 5 (log {10}{D L} 1)!,which gives:: D L = 10^{frac{(m M)}{5}+1}where DL is measured in parsecs. For nearby… …   Wikipedia

• The Dark Energy Survey — DES logo The Dark Energy Survey (DES) is a survey that aims to probe the dynamics of the expansion of the universe and the growth of large scale structure. The collaboration is composed of research institutes and universities from United… …   Wikipedia

• Luminosity function (astronomy) — In astronomy, the luminosity function gives the number of stars or galaxies with a given luminosity. [ [http://www.daviddarling.info/encyclopedia/L/lumfunc.html luminosity function] , David Darling, entry in The Internet Encyclopedia of Science …   Wikipedia

• luminosity — [[t]lu͟ːmɪnɒ̱sɪti[/t]] 1) N UNCOUNT The luminosity of a star or sun is how bright it is. [TECHNICAL] For a few years its luminosity flared up to about 10,000 times the present day luminosity of the Sun. 2) N UNCOUNT You can talk about the… …   English dictionary

• luminosity — /looh meuh nos i tee/, n., pl. luminosities. 1. luminance (def. 2). 2. the quality of being intellectually brilliant, enlightened, inspired, etc.: The luminosity of his poetry is unequaled. 3. something luminous. 4. Astron. the brightness of a… …   Universalium

• luminosity — noun a) the state of being luminous, or a luminous object; brilliance or radiance b) the ratio of luminous flux to radiant flux at the same wavelength; the luminosity factor …   Wiktionary

• Luminosity — Lu mi*nos i*ty, n. The quality or state of being luminous; luminousness. [1913 Webster] …   The Collaborative International Dictionary of English

• luminosity — [lo͞o΄mənäs′ə tē] n. [ML luminositas] 1. the quality or condition of being luminous 2. pl. luminosities something luminous 3. brightness …   English World dictionary

• The Weird Tapes Volumes 1-8 — The Weird Tapes are a set of music tapes issued in the early 1980s containing live, outtake and demo performances by Hawkwind.Dave Brock collated this material from his own private library and issued them as 40m TDK cassette tapes on his own… …   Wikipedia