A team of European astronomers have confirmed the presence of an unseen but predicted exoplanet in a distant solar system designated Kepler-88. The newly confirmed planet, Kepler-88c, had not been seen crossing in front of its parent star but its existence had been predicted because of the gravitational perturbation it caused on Kepler-88b, a planet which the Kepler space telescope had previously observed transiting the star. The team used the SOPHIE (Spectrograph for Observation of Phenomena of Stellar Interiors and Exoplanets) spectrograph at the Observatoire de Haute-Provence to confirm the presence of Kepler-88c. Over 3,500 planet candidates emerged from Kepler's...