I JUST NOTICED
Using the galaxy map in Mass Effect 1, when you open up particular star systems with asteroid belts, and just wait, you’ll see a glint of light- and when you click on them, you can get minerals, sometimes those prothean disks.
Like the Tereshkova system located in the Armstrong Nebula:
There’s actually a Carbonaceous asteroid where you can recover a League of One medallion. So has anyone ever noticed this? I just realized this on what, fourth playthrough I think?
I noticed it on my first playthrough, lol. XD They’re in almost every system. They have prothean disks, turian insignias, minerals/gasses, asari writings, league medallions… all the stuff you need for those “gather X number of X” side quests.