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Gliese 667 Cg is a suspected extrasolar planet orbiting around the star Gliese 667C, which is a member of the Gliese 667 triple star system. It has a minimum mass of 4.41 Earth masses, and cannot be more than twice as massive. It it likely an icy planet, although a subsurface ocean has not been ruled out. The planet's existence has yet to be confirmed.