Invading moon held by spoilers

[Barkhorn (OP)]

I just did my very first ground invasion, against precursors.  They had a single population, only 10 thermal signature.  My forces met no resistance.  How do I see what was producing that thermal signature, or do precursors just make fake thermal emission sources?

[TheBawkHawk]

Thermal signatures are created by facilities.  The base you invaded was a listening post, and will have a handful of Deep Space Tracking Stations on it.

[Barkhorn (OP)]

Thanks, I found them.  They were on a different population on the same body.