Defenses

Defenses are stationary structures built on your planets to help defend against enemy ships. They are usually considerably cheaper than ships for the same amount of power, but of course cannot be used in attacks.

In combat, all of the defender's defenses will fight just as ships do against an attacker. Unlike ships, however, at the end of combat each defense has a 70% chance of being rebuilt immediately for free.

Building

Just like ships, defenses may require certain technologies and shipyard levels. They are built at the shipyard and take time to build, depending on their cost. They follow the same formula as ships, which is

Time_hours = (Ore Cost + Crystal Cost)

                      ---------------------------
                      (2500 * (1+Shipyard Level))