Most radio telescopes use a parabolic antenna to amplify the waves and thus obtain a good reading of these, thanks to that it was possible to make known the form of radio wave emission radio emission can be presented in two forms: continuous radio and spectral lines, in the case of continuous radio the emission is spread over a wide region of the electromagnetic spectrum, in such a way that the spectral lines are centered on a specific frequency, since with the spectral lines reference is made to the radio region of the electromagnetic spectrum, because they usually find transitional, rotational and vibrational lines of the most common atoms and molecules in the universe, the most fascinating thing about this discipline that made known that our atmosphere allows the passage of the so-called radio window, which extends from frequencies as low as 15MHz comprises wavelengths of the order of 20 m, it was possible to register frequencies t even high as 900GHz which comprise wavelengths of the order of 0.3 mm.
In the case of the signals that can be observed in the radio band, they are generally very weak, so
In order to detect them, large antennas must be used, or groups of smaller antennas working in parallel, the technology in this range is being further developed, as in the case of varying from a few tens of centimeters to hundreds of meters, currently the Arecibo Puerto radio telescope rich. Thanks to this discipline with technological support, it was possible to know how: quasars, active galaxies, pulsars and microwave background radiation, 👧My way of seeing life Area73.