Antimatter Base

Alien Artifact showing Antimatter Around it

"A mysterious alien artifact. Our studies are inconclusive so far."
  — In-Game Description 

Alien Artifacts are located in every planet, with two per planet.

Little is known about the Alien Artifact, the only things known is that antimatter tend to gather around it, hence spotting one means spotting antimatter fields Nearby.

It cannot be attacked, and seem to produce antimatter fields nearby, antimatter is an uncommon resource that helps to upgrade your buildings and ships to mid levels.

It is unknown if they have any relation with the Aliens.