Tau Ceti is a star that hosts a planetary system and a common locale in much science fiction. It is the second closest spectral class G star to the Sun (after Alpha Centauri A), making it a popular story setting or system of origin in science fiction tales. The Sun, itself of spectral class G, provides an obvious model for the possibility that the star might harbor worlds capable of supporting life. But Tau Ceti, weighing in at ~0.78 M☉, is metal-poor and so is thought to be unlikely to host rocky planets (see by Frank Herbert below); on the other hand, observations have detected more than ten times as much dust around the star than exists in the Solar System, a condition tending to enhance the probability of such bodies. Since the star's luminosity is barely 55% that of the Sun, those pl