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.
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.