Tau Ceti

Tau Ceti is a star in the Milky Way galaxy, located about 12 light years from Planet Earth and the Sun. Along with the Sun, it forms one of only two star systems known to have natural life; the planet Cyprus, which orbits the star at a distance of 0.825 AU, has native plant life and also has a massive Earth-descended population. Athena (known as "Tau Ceti f" before 2047,) which was discovered by humans in 2012, has several human settlements, but its lack of an oxygenated atmosphere and low temperature have prevented a major Earth-descended presence.

From Earth, the star appears in the constellation Cetus. It has about 78% the mass of Earth's Sun.