It could also help intelligent extraterrestrials create maps of our world.
The mobile phone which has become an integral part of our daily lives could be the reason why alien civilizations spot our blue pale dot in the vast expanse of the universe. A recently published study has found that aliens on nearby stars such as Barnard's or Alpha Centauri A could detect radio signals leaked from our planet.
For years, projects such as the Search for ExtraTerrestrial Intelligence have been scanning the skies for radio signals from other civilizations that may be trying to contact us. In the late 1970s, researchers pondered if television broadcast signals and powerful transmissions from equipment such as military radar were beamingWhile TV broadcast over radio signals has drastically reduced, a new source has emerged, the mobile phone.
To figure out if the signal was powerful enough to be detected by a civilization on a nearby star, researchers at the University of Manchester and the University of Mauritius developed a computer model. The model was based on publicly available information about mobile phone usage and their distribution in different geographies of the globe. The team chose three stars, located within 10 light years from Earth, and assumed that a radio telescope equivalent to theAs per their computer model, mobile phone networks leak a peak power of about four gigawatts, while mobile phones themselves cumulatively leak lesser.
Interestingly, since mobile signals are transmitted parallel to the horizon and are distributed unevenly across the globe, they could be used to draw maps of their location and possibly even guess the distribution of landmass and waterbodies from afar.
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