The ET Research Lab ( 外生研, gaiseiken, also called the Outer Sidonia Research Laboratory or OSL, or EBD in Underwater's subs) is a laboratory positioned on the exterior of Sidonia, where long-term research on Gauna is performed. First introduced when they requested that the placental Hoshijiro be recovered, they store Placenta and placental specimens for study. The ET Research Lab is where the first placental Hoshijiro lives after her capture by Nagate.
Placenta can live for an unknown amount of time after being separated from their True Body. Some Placenta die immediately after being separated from the True Body; other pieces, like GA-273's arm and placental Hoshijiro, may live on for years, perhaps even centuries.
|Knights of Sidonia Characters|
Nagate Tanikaze | Izana Shinatose | Shizuka Hoshijiro | Honoka Sisters | Mochikuni Akai | Hinata Momose | Kashiwade Aoki | Izumo Midorikawa | Eiko Yamano - Toutarou Yamano| Samari Ittan | Tonami | Kouichi Tsuruuchi | Ichirou Seii | Norio Kunato | Kaoru Hazama | Ryouhei Kasuga | Kujira Negi | Hamagata | Hashine | Suzuki
|Immortal Ship Committee|
|ET Research Center |
|Toha Heavy Industries|
|Gauna 487 | Gauna 491 | Gauna 492 | Gauna 493 | Benisuzume | Placental Hoshijiro | Ocarina | Gauna 541 | Large Mass Union Ship | Lem Gauna Wall | Lem VII Gauna | Aulos|