Sorry. Indeed, the galaxy. The Halos destroy the Galaxy, not the universe. As far as I can recall, each Halo is capable of effectively destroying about a fourth/fifth of our Galaxy.
Additional:
The Ark is positioned far away and is considered a Shield World. Shield worlds exist in an alternate dimension called Subspace (which is used for warping and such), and take less than a square meter in the actual world. Shield Worlds are protected from the Halo weapon, making it a logical assumption the Halo weapon is not material but in fact a type of radiation or similar.
Question 2:
Was their a ring just chilling there in the middle of the ark?
Answer (spoiler):
Yes. It is a replacement for the Alpha Halo (Installation 04), which was destroyed by Master Chief in Halo. The Ark was busy constructing the new Halo and it was an advanced state, however not ready to fire yet. This is what causes the final skirmish, seeing Guilty Spark 343 is the monitor of Installation 04. Seeing his new Halo destroyed by a premature firing is unacceptable for him.
Q3:
At the beggining of the Halo mission, right at the first jump down, you should see some metal showing through on the floor. Look behind you and you should see a doorway, so though it and on the wall there will be a thing sticking out, cortana should say "whats that?", go over to it and activate it. What do you guys make of it? I've only seen it on normal so their might be more on legendary. Someone should post a script!
Answer:
I don't know. Is it some sort of Computer Terminal? If so, it is a Forerunner/Marathon Terminal with logs from different sources. On legendary I found that you get more info from some of them. I don't know how many there are, I found two of them.
PS. It's tha_rami.
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