far ultraviolet region

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• ultraviolet astronomy — Study of astronomical objects and phenomena by observing the ultraviolet radiation (UV radiation) they emit. It has yielded much information about chemical abundances and processes in interstellar matter, the Sun, and other stellar objects, such… …   Universalium

• Ultraviolet photography — is a photographic process of recording images by using light from the ultraviolet (UV) spectrum only.OverviewLight which is visible to the human eye covers the spectral region from about 400 to 750 nanometers. This is the radiation spectrum used… …   Wikipedia

• Ultraviolet — UV redirects here. For other uses, see UV (disambiguation). UVB redirects here. For the mysterious shortwave radio station in Russia, see UVB 76. For other uses, see Ultraviolet (disambiguation). False color image of the Sun s corona as seen in… …   Wikipedia

• ultraviolet radiation — Portion of the electromagnetic spectrum extending from the violet end of visible light to the X ray region. Ultraviolet (UV) radiation lies between wavelengths of about 400 nanometres and 10 nanometres, corresponding to frequencies of… …   Universalium

• Solar transition region — The solar transition region is a region of the Sun s atmosphere, between the chromosphere and corona. It is visible from space using telescopes that can sense ultraviolet. It is important because it is the site of several unrelated but important… …   Wikipedia

• Photodissociation region — Photodissociation regions (or photon dominated regions, or PDRs) are predominantly neutral regions of the interstellar medium in which far ultraviolet photons strongly influence the gas chemistry and act as the most important source of heat.cite… …   Wikipedia

• International Ultraviolet Explorer — (IUE) puic|1=|log=2008 August 31Organization(NASA, ESA, Science Research Council )Wavelength regimeUltravioletOrbit height42,000 km apogee, 26,000 km perigeeOrbit periodOne day (geosynchronous orbit)Launch dateJanuary 26, 1978End of… …   Wikipedia

• STS-63 — was the second mission of the US/Russian Shuttle Mir Program, which carried out the first rendezvous of the American Space Shuttle with Russia s space station Mir . Known as the Near Mir mission, the flight used Space Shuttle Discovery , which… …   Wikipedia

• mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …   Universalium

• radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… …   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