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Radio Astronomy
I. INTRODUCTION: SCOPE OF THE REPORT
The extraordinary progress of astronomy since 1945 has
largely been the result of technological innovation--the
development of detectors and telescopes that have opened
to observation regions of the electromagnetic spectrum
beyond the small band where the human eye and the photo-
graphic plate are sensitive. Radio astronomy, born in
attempts by engineers and physicists to detect cosmic
radio waves with the electronic instrumentation of com-
munication and radar, was the first step in this process.
Today it ranks as one of the major subdisciplines of
astronomy, pursued in the United States by two National
Astronomy Centers--the National Radio Astronomy Observa-
tory (NRAO) and the National Astronomy and Ionosphere
Center (NAIC)--and by research groups at many univer-
sities. Many of the most influential astronomical dis-
coveries of the last 35 years have been made almost
entirely by radio astronomers, and other key discoveries
were heavily dependent on their efforts, examples being
the discovery of the cosmic microwave background,
quasars, pulsars, and interstellar molecules.
The task of the Panel on Radio Astronomy has been to
assess the present status of observational astronomy at
wavelengths longer than a few hundred micrometers, to
identify the opportunities for research during the coming
decade in this large region of the spectrum, and to rank
211
Representative terms from entire chapter:
radio astronomy