background brightness
1Background (astronomy) — In astronomy, background commonly refers to the incoming light from an apparently empty part of the night sky. Even if no visible astronomical objects are present in given part of the sky, there always is some low luminosity present, due mostly… …
2Cosmic infrared background — (CIB) is a mysterious infrared light coming from outer space. It is slowly being resolved into specific sources by infrared telescopes. In some ways it is analogous to the cosmic microwave background, but at shorter wavelengths. Contents 1… …
3Surface brightness — is a concept used in astronomy when describing extended astronomical objects such as galaxies and nebulae.General descriptionThe apparent magnitude of an astronomical object is generally given as an integrated value mdash;if a galaxy is quoted as …
4Surface 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 …
5Cosmic Background Explorer — (COBE) General information NSSDC ID 1989 089A Organization NASA …
6Diffuse Infrared Background Experiment — DIRBE instrument lightpath Diffuse Infrared Background Experiment (DIRBE)[1] was an experiment on NASA s COBE mission,[1] to survey the diffuse infrared s …
7Pacific Tree Frog — Conservation status Least Concern ( …
8яркость темнового фона ЭОП — Яркость на выходе электронно оптического преобразователя при отсутствии облучения входа. Обозначение B0 [ГОСТ 19803 86] Тематики преобразователи электронно оптические EN background brightness DE Grundhelligkeit FR brilliance de fond d’obscurité …
9cosmos — /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… …
10Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… …
