All the alien structures in Empyrion: Galactic Survival belongs to Alien Faction. The core of the alien faction emits red light as oppose to green light for player core. There are five distinct alien faction in Empyrion-
Each faction occupies different planets And POIs on planets. Faction attitude towards the player is influenced by completing faction missions, killing predators, and a number of other actions that you can find through the PDA.
In addition to alien factions, there are also Trader and Pirate factions introduced in Alpha 12 that are being developed.