Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
There are 2759 entries in this glossary.| Term | Definition |
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| Feedhorn |
A horn-shaped antenna used in a radio telescope to convert radio energy into electrical signals, which then go to a receiver. The size of the horn has to match the wavelength of the radio signal it is designed for. Thus, a radio telescope capable of operating at several different wavelengths will require a set of feedhorns.
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