More on Spaceships
The different spaceships have a real effect on the game:
Transports: These are used to salvage a resource, equipment or population card in event that a colony is attacked, you can use your transport to evacuate populace or other to another colony that can take them.
Colony Destruction: If a colony is attacked by a player (or aliens!) the resource investment (resource cards, equipment cards, population cards) is lost unless a transport is deployed to the system.
That should do it for now, so enjoy the game.