brightness distribution

См. также в других словарях:

• brightness distribution — skaisčio pasiskirstymas statusas T sritis radioelektronika atitikmenys: angl. brightness distribution vok. Helligkeitsverteilung, f rus. распределение яркости, n pranc. distribution de la brillance, f …   Radioelektronikos terminų žodynas

• distribution de la brillance — skaisčio pasiskirstymas statusas T sritis radioelektronika atitikmenys: angl. brightness distribution vok. Helligkeitsverteilung, f rus. распределение яркости, n pranc. distribution de la brillance, f …   Radioelektronikos terminų žodynas

• Brightness temperature — is the temperature at which a blackbody in thermal equilibrium with its surroundings would have to be in order to duplicate the observed intensity of an object at a frequency u.This is a useful concept only for radiation that obeys the… …   Wikipedia

• Surface brightness fluctuation — (SBF) is a secondary distance indicator used to estimate distances to galaxies. The technique uses the fact that galaxies are made up of a finite number of stars. The number of stars in any small patch of the galaxy will vary from point to point …   Wikipedia

• 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

• Spectral energy distribution — A spectral energy distribution (SED) is a plot of flux, brightness, or flux density versus frequency or wavelength of light. It is used in many branches of astronomy to characterize astronomical sources. For example, in radio astronomy, an SED… …   Wikipedia

• photography, technology of — Introduction       equipment, techniques, and processes used in the production of photographs.  The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …   Universalium

• Very Long Baseline Interferometry — (VLBI) is a type of astronomical interferometry used in radio astronomy. It allows observations of an object that are made simultaneously by many telescopes to be combined, emulating a telescope with a size equal to the maximum separation between …   Wikipedia

• telescope — /tel euh skohp /, n., adj., v., telescoped, telescoping. n. 1. an optical instrument for making distant objects appear larger and therefore nearer. One of the two principal forms (refracting telescope) consists essentially of an objective lens… …   Universalium

• Altair — This article is about the star in the constellation Aquila. For other uses, see Altair (disambiguation). Altair …   Wikipedia

• Freeman Law — is a statement in astronomy which says that disk galaxies have a constant surface brightness, Σ. It was noticed in 1970 by Ken Freeman.McGaugh et al, [http://arxiv.org/abs/astro ph/9505062 Galaxy Selection and Surface Brightness Distribution]… …   Wikipedia