One of these exoplanets, HD 20794d, is likely to be a rocky planet in the habitable zone of its parent star, the G-dwarf HD 20794. This image shows the habitable zone around HD 20794 (green) and the trajectory of the three planets in the system. Image credit: Gabriel Pérez Díaz / SMM / IAC. “HD 20794, around which HD 20794d orbits, is not an ordinary star,” said UNIGE astronomer Xavier Dumusque. “Its luminosity and proximity makes it an ideal...