The Ardis system (アーティス 星関連 の Ātisu-boshi kanren no ) was the location of some type of explosions by a "craftsman" that was captured by Samus Aran. She states that the mission was a request from an old friend, and wouldn't have bothered with it otherwise. The location is only mentioned in the first page of the Metroid Manga.
Federation Solar System | Gaflar System | Kalandor region | Messina System | Extreme Galaxy
Milky Way Galaxy | Small star | SR388's solar system | Sun | Tetra Galaxy | Unknown Solar System