Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pht....44d..60c&link_type=abstract
Physics Today (ISSN 0031-9228), vol. 44, April 1991, p. 60-67.
Astronomy and Astrophysics
Astrophysics
Aerospace Sciences, Astronomy, Astrophysics, Big Bang Cosmology, Electromagnetic Radiation, Atmospheric Attenuation, Earth Atmosphere, Gamma Ray Astronomy, Radio Waves
Scientific paper
Development trends of space astronomy are reviewed, and a balanced program of large, medium, and small missions is presented. The Great Observatories Program is described and its main research problems are noted. The Gamma Ray Observatory will study explosive phenomena, particle acceleration near neutron stars and black holes, and the distribution of cosmic rays and gas in the Galaxy. The Advanced X-ray Facility will study the coronas of normal and active stars, chemical analysis of supernova remnants, the active nuclei of galaxies and quasars, and the point-source component of the cosmic X-ray background. The Extreme Ultraviolet Explorer will help to clarify the understanding of hot, white dwarf stars and cataclysmic variable stars and will probe the hot plasmas associated with stellar coronas. Other Explorer programs including the X-Ray Timing Explorer, the Advanced Composition Explorer, and the Far-Ultraviolet Spectroscopic Explorer are described. Consideration is also given to the Small Explorer missions that provide rapid access to space for payloads weighing less than 200 kg.
Canizares Claude R.
Savage Blair. D.
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