This planet was found in data in a larger survey of red dwarf stars performed by HARPS, a spectograph on the 3.6-meter telescope at the European Southern Observatory's La Silla Observatory in Chile. Red dwarfs are the most common kind of star in our galaxy. Gliese 667 Cc was found as a part of this survey, while the other planet (Gliese 667Cb) was discovered in 2010 and the results not published. In this triple-star system, Gliese 667 A and B orbit each other. The third star, Gliese 667 C, orbits the pair. Notably, Gliese 667 Cc appears to be habitable because it is a super-Earth in the habitable region of its star. "This planet is the new best candidate to support liquid water and, perhaps, life as we know it," study leader Guillem Anglada-Escudé, with the University of London, said in a statement. The HARPS survey was led by the University of Grenoble's Xavier Bonfils.
Image: Artist's impression of sunset on a super-Earth, Gliese 667 Cc. The red dwarf star the planet orbits is setting, while two other stars in the triple-star system are visible at the right. Credit: ESO/L. Calçada