Astronomers have recorded a narrow beam of radio waves with a frequency of about 980 megahertz, emanating from the direction of Proxima Centauri, the closest star to the Sun, located at a distance of 4.2 light years, according to The Guardian.
The observations were carried out for 30 hours using a radio telescope at Parkes Observatory in Australia in April and May last year. Although the source of the signal could be ground equipment or an orbiting satellite, the shift in radio frequency corresponds to the movement of the planet. This indicates that the source of the radio waves may be from an alien civilization, although the likelihood of this is very low.
Although the 980 megahertz band remains free of artificial signals of terrestrial origin, astronomers believe that another possible source could be a comet or a cloud of hydrogen.
One gas giant and one rocky planet, which is 17 percent larger than Earth, revolves around Proxima Centauri. Since the star closest to the Sun is a red dwarf star, powerful flares are possible on it, making life on an exoplanet impossible.