I'm hijackng this thread for similar ruin related goodness.
I was under the impression that sensors detected ruins, thermal or EM but I'm not sure, so I've been scouting new systems with a frigate equipped with strength 36 thermal, a strength 18 EM sensor, as well as a short ranged res 1 active.
I've been sending it directly to low cost worlds looking for NPRs but had hoped it would also detect ruins and anomalies, but after scouting 70 ophiuchi and coming up empty I put a colony on an almost inhabitable world. Imagine my surprise when I saw on the population and production screen that the world had an anomy and ?? Abandoned installations.
I've seen no mention of discovered ruins in the event log and in addition the known ruins box under display 2 is showing nothing.
Why didn't I discover anything? I haven't geosurveyed the planet yet.