Tau Ceti f is an unconfirmed planet that may be orbiting the nearby Sun-like star Tau Ceti 11.905 light years from the Sun. It is the fifth planet from Tau Ceti in its system -the outermost planet of the system discovered as of 2012. It orbits Tau Ceti at a distance of 1.35 AU with an orbital period of 642 days and has a minimum mass of 6.6 Earth masses which classifies it as a super-Earth. Assuming thst Tau Ceti f is a terrestrial planet with an Earth-like atmosphere, the surface temperature would be approximately −40°C (233 K). With a denser atmosphere able to produce a stronger greenhouse effect it could have a much higher temperature, between 0°C and 50°C, enough for complex life to exist. This means terraforming could easily be done by adding tons of extra greenhouse and buffer gases.