Apex Site
From Halopedia, the Halo wiki
File:HW17.png
The structures
These Forerunner Structures consist of many towers, orbiting over an unknown planet [1].
The purpose of these towers is currently unknown, it is known to include a Beam Emitter like many other Forerunner facilities. Though unlike the standard Beam Emitters, this energy is channeled into one continuous stream, instead of a single bolt of energy.