It's tied to the Horizon Signal event chain. Most of its outcomes won't generally harm you, but one makes it possible to wipe this planet of its inhabitants, so watch what you click. 
A guide for 2.2 is here: https://stellaris.paradoxwikis.com/Horizon_Signal#The_Waiting_World:_Shadows_in_the_walls
While details can be different, the main outcomes should still apply to the console's 1.7 version.
A guide for 2.2 is here: https://stellaris.paradoxwikis.com/Horizon_Signal#The_Waiting_World:_Shadows_in_the_walls
While details can be different, the main outcomes should still apply to the console's 1.7 version.