'Chrono Space' (クロノスペース Kurono Supēsu) is the space used to facilitate faster-than-light travel and communications as well as being the main means of traveling in the universe. Traveling through Chrono Space is referred to as entering Chrono Drive and a ship in Chrono Space cannot be attacked by an enemy in normal space. Elsior and Luxiole are two of many ships capable of accessing Chrono Space.
A Chrono Quake rendered transition into Chrono Space non-viable, causing the collapse of EDEN's Civilization and other advance civilizations across the universe.