Planetary Shield

The planetary shield, like all military buildings, requires nothing to build. Built-in generators produce enough energy for the shield. The shield does not damage the enemy but absorbs any energy impulse directed at the planet. Thus, during an attack the shields take the hits first. After battle the shield is fully restored. At least one such structure is recommended for planetary defense; it helps prevent mass bombardment of the planet that would destroy civilian buildings.

Specs:
Shield: 1000 per level

Object mass: 100000