Tau Ceti system

Tau Ceti (τ Cet / τ Ceti, pronounced /ˌtaʊ ˈsiːtaɪ/) is a star in the constellation Cetus. A yellow-orange dwarf star, it is similar to Sol in mass and spectral type. At just under 11.9 light years distant from the Sol system, it is a relatively close star. The system is surrounded by an Oort cloud.

This system was inhabited by a significant Covenant presence in 2552, including the refit and repair station Unyielding Hierophant, accompanied by a massive fleet of warships prepared to attack Earth. The station was destroyed by UNSC forces September 13, 2552, including the majority of the Covenant fleet.

Trivia
Tau Ceti is also the setting for the first Marathon game.

List of appearances

 * Halo: First Strike
 * Halo 5: Guardians
 * Limited Edition