In the end of halo 5 guardians and the begining of halo infinite there is a planet very visible from the ring.
Why can’t we see it during gameplay? From the part where your just starring at the ring in space waiting for fernando to pick you up, or being on the surface of the ring its self.
I think Cortana realised Atriox had the ring so blind jumped to an unknown location to better protect the galaxy from its destructive power. Then crashed the guardian into it to disable any chance of moving or firing the ring. The Chief and any debris probably got dragged through slipspace within the rings gravitational field.
The ring was moved. The Banished mention about being lost and stuck here several times. Not sure what prevents them leaving via Slipspace. But they don’t seem to be in contact with the rest of the Galaxy.
In the audio logs it’s mentioned that the Silent Auditorium exploded but there isn’t specifically a mention of the ring entering Slipspace. I think at one point they mention being surprised that something this scale could move. So possibly these happened at the same time, or it wasn’t a standard Slipspace jump. If you’ve seen Halo Wars 2 it’s pretty obvious when the ring does this.
Because when Zeta Halo was severely damaged, it initiated “emergency slipspace jump”, taking everything around it(including Banished ships, UNSC debris and the Master Chief who was drifting in space) with it to an unknown location.
No, if you read First Strike by Eric Nylund the Chief and Blue team fought a small skirmish on top of a ship passing through slipspace. It was difficult but it was proven to be possible.