International Ultraviolet Explorer


Also found in: Dictionary, Acronyms, Wikipedia.
Related to International Ultraviolet Explorer: Compton Gamma Ray Observatory, Extreme Ultraviolet Explorer

International Ultraviolet Explorer:

see ultraviolet astronomyultraviolet astronomy,
study of celestial objects by means of the ultraviolet radiation they emit, in the wavelength range from about 90 to about 350 nanometers. Ultraviolet (UV) line spectrum measurements are used to discern the chemical composition, densities, and temperatures
..... Click the link for more information.
.

International Ultraviolet Explorer

(IUE) A satellite that is a joint project of NASA, ESA, and SERC (the UK's Scientific and Engineering Research Council) and was launched by NASA into an elliptical geosynchronous orbit on Jan. 26 1978. Its 45-cm Ritchey-Chrétien telescope focuses ultraviolet radiation on either of two echelle grating spectrographs providing about 0.01 nm spectral resolution; they operate in the wavelength range 115–190 nm and 180–320 nm. In addition lower resolution (about 0.6 nm) spectrographs are available for observations of faint sources. The satellite is controlled from ground stations in Maryland and Madrid by real-time data link, which permits operation in a manner similar to that of a ground-based observatory. In the 18 years of operation over 90 000 spectra were obtained on a wide variety of astronomical sources including planets, comets, interstellar dust and gas, stars of most spectral types, galaxies and galactic halos, Seyfert galaxies, and quasars (see ultraviolet astronomy). IUE became the longest-lived astronomical satellite ever, and finally ceased operating in 1996.
References in periodicals archive ?
Her team looked for traces of hydroxyl with the International Ultraviolet Explorer satellite in October 1992.
Melissa McGrath of the Space Telescope Science Institute and her colleagues report that Io's atmosphere extends about 900 kilometers above the surface, about one-eighth the maximum height inferred by another orbiting instrument, the International Ultraviolet Explorer.
Observations with the International Ultraviolet Explorer (IUE) satellite on Feb.
Other satellites, such as the International Ultraviolet Explorer, have yielded similar ratios but with far greater uncertainty, Linsky notes.

Encyclopedia browser ?
Full browser ?