Astronomers have detected a repeating radio signal from an exoplanet and the star that it orbits, both located 12 light-years away from Earth. Second potentially habitable Earth-size planet found orbiting nearby star “What we’re doing is looking for a way to see them,” said study coauthor Jackie Villadsen, assistant professor of physics and astronomy at Bucknell University in Pennsylvania, in a statement. “But I think it’s going to be a lot of follow-up work before a really strong confirmation of radio waves caused by a planet comes out