Do aliens know that we’re here? They should.

Aliens on nearby stars could detect Earth through radio signals leaked from the planet, new research suggests. Scientists from The University of Manchester and the University of Mauritius used crowd sourced data to simulate radio leakage from mobile towers to determine what alien civilisations might detect from various nearby stars, including Barnard’s star, six light years away from Earth.

The research, published in the “Monthly Notices of the Royal Astronomical Society journal”, found that only more technologically advanced civilisations would be able to detect the current levels of mobile tower radio leakage from Earth. However, as most alien civilisations are likely to have more sensitive receiving systems and as we move towards more powerful broadband systems on Earth, the detectability of humans from other intelligent beings will become more and more likely.

Professor Mike Garrett, Team Leader of the project and Director of Jodrell Bank Centre for Astrophysics at The University of Manchester, said: “I’ve heard many colleagues suggest that the Earth has become increasingly radio quiet in recent years – a claim that I always contested.

“Although it’s true we have fewer powerful TV and radio transmitters today, the proliferation of mobile communication systems around the world is profound. While each system represents relatively low radio powers individually, the integrated spectrum of billions of these devices is substantial.

“Current estimates suggest we will have more than one hundred thousand satellites in low Earth orbit and beyond before the end of the decade. The Earth is already anomalously bright in the radio part of the spectrum; if the trend continues, we could become readily detectable by any advanced civilisation with the right technology”.


 




XHTML: You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>