If you'll excuse the self-link, I have written about this at length: https://www.damninteresting.com/space-radio-more-static-less-talk/ https://www.damninterest

If you'll excuse the self-link, I have written about this at length: https://www.damninteresting.com/space-radio-more-static-less-talk/ https://www.damninteresting.com/space-radio-more-static-less... In short, even our largest, most sensitive radio telescopes are far too small to detect omnidirectional (e.g., FM radio) leakage from Sol's nearest celestial neighbor. Unless an exoplanet directs a coherent radio beam at Earth, we'd need an antenna larger than the planet to detect a signal amid the noise.