sky background brightness

См. также в других словарях:

• Background (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… …   Wikipedia

• Cosmic 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… …   Wikipedia

• Cosmic Background Explorer — (COBE) General information NSSDC ID 1989 089A Organization NASA …   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

• Diffuse 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 …   Wikipedia

• eclipse — eclipser, n. /i klips /, n., v., eclipsed, eclipsing. n. 1. Astron. a. the obscuration of the light of the moon by the intervention of the earth between it and the sun (lunar eclipse) or the obscuration of the light of the sun by the intervention …   Universalium

• optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …   Universalium

• Helicon Filter — Infobox Software name = Helicon Filter caption = Helicon Filter 4.81 running on Windows XP developer = Helicon Soft Ltd. latest release version = 4.90 latest release date = September 25, 2008 latest preview version = latest preview date =… …   Wikipedia

• Binoculars — Binocular telescopes, or binoculars (also known as field glasses), are two identical or mirror symmetrical telescopes mounted side by side and aligned to point accurately in the same direction, allowing the viewer to use both eyes (binocular… …   Wikipedia

• 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

• Mathematics 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… …   Universalium