There are a set of monolith in several places in the system. I have found one personaly.
Those monoliths have some kind of code..
Those codes were joined together in a calculation and a secret loation was found. Im not sure but i belive the special t5 ore was found there.
There are also several monuments, some of them underground that ppl have found.
Some players theorize that the way to go to another system is linked to those acient monuments.