Manual:Game Mechanics/Worlds

Worlds are planets that have been colonized.

Defenses
World defenses can protect spaceships in the same hex. Defenses that try to 'defend' other spaceship, lose stealth for the battle.

Defenses are built exactly as spaceships are, but use the world's construction value. Their size is limited by your total ranks in Combat technology. Defenses require hull 1 to be functional as they need a housing.

Defenses may also be equipped with certain modules, though they are treated as 1/2 (rounded down) of their size for module capacity (so a size 6 defense can only equip 3 total size of modules for example).