Ruined Planet

Location
Always orbiting a star very near the player's Home Star. It cannot be colonized manually, but occasionally AI races will colonize it.

Description
As part of the space stage tutorial you will find ruins of a long lost civilization. You soon find out that they were wiped out by the Grox. As soon as you scan the city, its automated security drones appear and, believing that the player is one of the Grox, attack them. This is the first time you will use weapons against other spaceships (assuming that you attack the ships that come after you).

Colonize the planet
A way to colonize it is:
 * Drop a Monolith
 * If the creatures are in space stage, you can get the planet by war or a trade route
 * Capture the planet or buy it