Solar Rails are Orokin structures that allow ships to easily travel between planets within the Origin System and other star systems. These rails utilize the power of the Void to teleport ships across vast distances. Through Junctions, players can activate these rails to unlock the ability to travel to other planets in the Star Chart. Currently, there is no way to travel to other star systems, despite the lore saying they can.
A related term, "Rail Agent", refers to smugglers and pilots who do illegal work around the Origin System. These people usually drive "Rail tractors", specialized ships with high maneuverability to escape authorities. Little Duck is one of these people as she does illicit freelance work.
- Railjacks are probably named after the fact that they can travel between planets without the need of a Solar Rail, using Void-powered engines. This is thanks to the Reliquary Drive, which is the key to the Railjack's power.
- "Through my filthy porthole I saw stars among the outlines of the other Splinter ships queuing for the Solar Rail. It would soon grip us with an incomprehensible power and cast us through the void into the mouth of our enemy. [...] The alien blue star was dark and blinding beyond us. The countless articulating worm-ships of our enemy, ringed in glowing discs, undulating and heat-bursting the surviving soldiers like me." - Codex entry on Orokin ships traveling to the Tau System during The Old War
- Fortuna/Quotes#Male Solaris C