Please read up on your facts before wrongly pointing things out. [link](megastructure) <-- found here,
The five Lagrangian points in a two-body system. For Halo, the gas giant is the yellow circle, the lone moon is the blue circle, and the ringworld is positioned at L1. Physicist Kevin R. Grazier, Ph.D, posited in a 2006 essay the composition and problems associated with a Halo installation. The complete Halos seen in Halo: Combat Evolved and Halo 2 orbit gas giants similar to Jupiter, though much larger; the bodies exhibit characteristics of both a jovian planet and a small star. In each system, there are five points where a body of negligible mass would remain stationary to the two much larger bodies in the system, the gas giant and its moon. These areas, known as Lagrange points, are classified by stability; while bodies at 60° angles to the gas giant would remain in the same location relative to the other objects in the system, the other three Lagrange points are meta-stable, having the tendency to be unstable in one direction. As the Halos are located at point L1, the installations must actively correct its orbit. The apparent gravity of the Halo installations is close to Earth normal. A Halo would have to spin with a tangental speed of 7 kilometers (4.3 mi) per second to match Earth's gravity, translating to 19.25 rotations in a day."