Tyree was a planet located in a binary star system where the Orb of the Emissary was hidden. The planet featured a desert and was enveloped by an ionized atmosphere that interfered with ship sensors. In 2375, Benjamin Sisko traveled to Tyree with his father Joseph Sisko, his son Jake Sisko, and Ezri Dax to find the orb, after receiving a series of visions from the Prophets of Bajor.