Massive radio telescope arrays are soon to be built around the world – notably, for me as an Aussie, the Square Kilometre Array, and other systems around the globe. Such incredibly sensitive radio telescope clusters will allow direct detection of electromagnetic leakage (RADAR, TV, and radio) from star systems within 30 light years or more for tight beams…
Eavesdropping on Radio Broadcasts from Galactic Civilizations with Upcoming Observatories for Redshifted 21cm Radiation
…so before long we might be able to say if there’s Anyone nearby with technology akin to our own. Perhaps they all use lasers, neutrinos, gravitons or even tachyons? Maybe. Or maybe they use radio too.
