radio astronomyn.
/ˌreɪdɪəʊ əˈstrɒnəmi/, U.S. /ˌreɪdioʊ əˈstrɑnəmi/ Astronomy.
The branch of astronomy that deals with the study and interpretation of radio waves reaching the earth from space, and (formerly) with the astronomical use of radio-echo techniques.
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radio astronomy1948
1948 Sci. News Let. 1 May 279/1 Radioastronomy is a new branch of astronomy only recently announced, Dr. Shapley stated. By use of high-frequency radio waves meteors are tracked in their flight.
1951 Sci. News 21 40 There are two basic methods of observing in radio astronomy. In the first, we use the familiar processes of radar to explore space around us.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XI. 247/1 Large radio antennas designed for radio astronomy are now used for radar, radio communications, and satellite telemetering.
1973 ‘D. Halliday’ Dolly & Starry Bird xiii. 188 Innes is a Steady-State man, having done a sabbatical on radio astronomy at Cambridge.
1977 J. Narlikar Struct. Universe iii. 66 Radio-astronomy has played an important part in galactic explorations.
1999 Sky & Telescope Oct. 69/1 Frequencies around the hydrogen line are supposed to be protected for radio astronomy, so terrestrial interference is less severe than elsewhere across the radio spectrum.
This entry has been updated (OED Third Edition, June 2008; most recently modified version published online March 2022).
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n.1948