ok while scanning for planets i suggest that you could find other things by accident it would make it more realistic so what i suggest is that when you are scanning for planets you can find some of these things
1 meteors
viewtopic.php?f=6&t=7207&p=57682#p576822 random NPCs (because your bound to run into ships)
im sure there are other things we could find and i hope you comment saying other stuff for me to add/take off of this list