First possible radio signal emanating from an exoplanet about 51 light-years away, detected If confirmed through follow-up observations this radio detection opens up a new window on exoplanets and provides a novel way to examine alien worlds that are tens of light-years away. Dec 22, 2020 08:58:01 IST An international team of scientists has collected the first possible radio signal from a planet beyond our solar system, emanating from an exoplanet system about 51 light-years away. Using the Low-Frequency Array (LOFAR), a radio telescope in the Netherlands, the researchers uncovered emission bursts from the Tau Bootes star-system hosting a so-called hot Jupiter, a gaseous giant planet that is very close to its own sun.