The Lunar Security helps protect your base against meteorites. Each Lunar Security building shoots of big missiles at incoming Aliens and Meteorites.
Another handy feature of any Lunar Security on the map is that it has the ability to power up ALL buildings knocked out by Aliens or Meteorites. Build quite a few of these.
Complement these with plenty of SkyShield Missiles.
Yield Time: 2d0h (48s)