Gilly is very small, you will probably find them after a brief search. There could even be a third one there, I saw this while in game and ignored it because I thought was discovered by The Space Peacock. I'm not sure if it counts as a separate location and is an anomaly. There are at least two on Dres, which you'll likely come across in a secondary mission.
Allow me to post my favorite so far, this object located on Pol is suspected to be hollow. I really enjoy looking for these and I hope the devs add even more of them, it makes exploration so much more rewarding.
