Outer Ruins

...The surfaces inside the dome glow with a faint yellow light. An unknown script covers the walls from top to bottom. At the center of the main chamber is a console with two large buttons: one deep blue, the other a vibrant green. We are in the process of deciphering the text on the walls, to see if it gives us an indication of what this console might be for. … has reported sensor abnormalities since entering the dome. Caution is advised.

The command below will trigger the "Outer Ruins" event in Stellaris:

When this event fires, you can choose between the following option:

• What on … is going on? Weren't they lost?
  • Leads to event: A Choice

Stellaris events fire in chains — one event leads to the next. Here is how Outer Ruins (astral_rift.1510) connects.