- last post: 01.01.0001 12:00 AM PDT
We don't know how many Halo rings there are, but we do know there are at least for (the ring in Halo one was Installation 04).
In a different thread, someone figured out how may Halos it would take to wipe the Milky Way Galaxy clean of sentient life, since 343 GS tells us it has an effective radius of 25,000 light years. I don't remeber what they figured out, though, and I can't find the thread....