XHHH: The PriFetics. Lovely guys come in private. Explain the girl how spacecraft sweep the vastness of the universe;)
yyy: "The Voyager 2 flight lasted much longer than planned. In this regard, after the passing of Jupiter, the scientists accompanying the mission had to solve a huge number of technical problems: failure of the radio transmitter signal frequency compensator. This device was to adjust the frequency of the carrier radio transmitter in connection with the fact that it, moving at a speed of about 11.5 km / s, experiences a significant Doppler shift. The problem was solved by creating in the shortest possible time a terrestrial analogue of this device, but already for the ground reception complex operating to date, without which communication with the apparatus would be impossible.
YYY: to continue?