Eido-Thea System

 ![Eido-Thea depicted by the orrery in the Observatory](wiki-images/dc/dce7f8a9c9d86581f062d2ed31989332.png)   The **Eido-Thea system** is the star system in which the events of Subnautica 2 take place. It is a binary star system located near the pulsar PSR K1745-2856, which is situated rimward of the Djorgovski 2 globular cluster at the base of the Norma Arm in the Milky Way.   ## Composition   Based on the Orrery created by the Axum, the system contains two stars, seven planets, and three moons. The celestial bodies are described as follows:   *   **Eido and Thea**: A pair of M0V class stars (red dwarf stars) in a contact binary at the center of the system. Eido and Thea are each approximately 0.57 times the mass of the Sun and have 0.5 its radius. *   **Inner World**: A small, rapidly orbiting world close to the stars. *   **Elliptical Planet**: A planet with an elliptical orbit that swings close to the stars, then climbs far outward. *   **Apiary**: A ringed gas giant (known to the Axum as Apiary) with three large moons, one of which is Proteus. Apiary has a mass approximately 1.1 times that of Jupiter, or 350 times that of Earth. *   **Co-orbital Planet**: A tiny planet sharing the orbit of the aforementioned gas giant, racing ahead of it. *   **Rocky World**: A large, rocky world. *   **Inclined Ice Giant**: A cold ice giant with an inclined orbit. *   **Ringed Ice Giant**: An ice giant with a very large ring system.   ## Gallery   ![Render of the Axum Observatory orrery](Orrery.png)   ## Relevant Databank Entries   *   Orrery *   Distance from Earth   ## Trivia   *   The star system is named after a minor figure in ancient Greek mythology called Eidothea, who is a daughter of the ancient sea god Proteus. *   Unlike the fictional Ariadne Arm, the Norma Arm and Djorgovski 2 globular cluster are existing locations. *   The pulsar PSR K1745-2856, however, is fictional. *   The binary nature of the star system was already shown in the "Take a Deep Breath" Gameplay Reveal Teaser (cf. minute 0:16).