There are 7 unique codex entries in the Locations section on Tython. 6 are accessible to all players regardless of class or faction and 1 is class specific.
Jedi Temple is obtained near a proximity map trigger.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
Kalikori Village is obtained near a proximity map trigger.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
Ruins of Kaleth is obtained near a proximity map trigger.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
The Chamber of Speech is obtained near a proximity map trigger.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
The Forge | Coordinates: 26, 1567 | Location: Tython: The Ancient Forge
The Forge is obtained near a proximity map trigger during "The Forge" mission as a Jedi Consular player or "Weapon of the Jedi" mission as a Jedi Knight player. The Forge is unobtainable for Smugglers and Trooper characters.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
The Gnarls is obtained near a proximity map trigger.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None
Tythos Ridge is obtained near a proximity map trigger.
Codex type: Locations | Faction: Republic | Class: All
Associated Achievement: None