Elysian satellites are devices used originally by the Chozo and Elysians, and then later on by Samus Aran, to study planets and other objects in space. One of these satellites originally detected Phaaze, and others were launched in order to gain detailed information of planets explored by Samus during Metroid Prime 3: Corruption. These satellites are found in and then launched from the Chozo Observatory. These are able to detect Energy Tanks, and Missile Expansions and Ship Missile Expansions. They can also be launched to obtain Logbook entries on Tallon IV and Aether, the planets that were the settings of Metroid Prime and Metroid Prime 2: Echoes.