All samples in the game can be collected from the map. They are most often found around various structures, nests, and points of interest (POIs). You may have to run around a bit to spot them, though ...

Samples are an essential currency found when exploring planets on different difficulty levels. Each sample type -- common, rare, and super -- is used to purchase unique upgrades for your Ship Modules ...

Before that, it is important to note that rare samples are needed for certain upgrades in your cruiser. Especially the upgrades that deal with enhancing aspects of your defensive ordinances, like the ...