Artist's conception of the horizon of Gliese 667 Cd
Gliese 667 Cd is an extrasolar planet orbiting around the star Gliese 667C, which is a member of the Gliese 667 triple star system. It is slightly more massive than Gliese 667 Cc. While it is likely an icy planet located outside the system's habitable zone, it is suggested that Gliese 667 Cd could have a subsurface ocean under the ice. [1]
The existence of Gliese 667Cd was theorized in 2012 and finally confirmed in 2013.