Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mercu...5...26s&link_type=abstract
Mercury, vol. 5, Mar-Apr. 1976, p. 26-31.
Astronomy and Astrophysics
Astronomy
Interstellar Matter, Oao 3, Spaceborne Astronomy, Stellar Atmospheres, Stellar Radiation, Ultraviolet Photometry, Chromosphere, Cosmic Dust, Interstellar Gas, Kohoutek Comet, Solar System, Stellar Envelopes, Stellar Winds, Ultraviolet Spectroscopy
Scientific paper
A brief general description of the results obtained by the Copernicus satellite is given, emphasizing reasons for conducting UV observations from space and the advantages of Copernicus relative to other UV satellites. Advantages noted include the satellite's ability to observe at shorter wavelengths than the other satellites, its small field of view, and its high spectral resolution. Results of observations of the interstellar medium are summarized, with attention given to the chemical composition of the interstellar gas, the structure of interstellar clouds, and the existence of a very hot intercloud medium. Observations of stellar chromospheres, coronae, and winds are discussed, and a typical P Cygni profile is presented. Other Copernicus projects are pointed out, including observations of stationary gas shells around certain stars, spectral scans of Nova Cygni 1975, the detection of hydrogen emission from comet Kohoutek, observations of earth's atmosphere, and attempts to detect evidence of advanced extraterrestrial civilizations.
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