Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977s%26t....54..371s&link_type=abstract
Sky and Telescope, vol. 54, Nov. 1977, p. 371-374.
Astronomy and Astrophysics
Astronomy
Interstellar Gas, Oao 3, Stellar Mass Ejection, Ultraviolet Astronomy, Cool Stars, Interstellar Matter, Stellar Spectra, Ultraviolet Spectrometers
Scientific paper
The Copernicus satellite (in operation for five years) has yielded data in the study of interstellar gas via ultraviolet spectroscopy. Its optical design consists of a modified Cassegrain-focus arrangement with a 32-inch primary mirror and a Pascher-Runge spectrometer. The stellar image is maintained at the center of the spectrometer's entrance slit by a self-correcting guidance system. Recent research projects have concerned hot stars and the winds they emit, and motions within the interstellar medium. More specifically, the mass ejection by hot stars and speeding clouds in space have been investigated. Other topics with which Copernicus studies have been involved include: ultraviolet interstellar extinction by dust grains, and chromospheres and coronas of cool stars.
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