So its pointed out here in Halo Warfleet - https://www.halopedia.org/images/4/45/HWF_-_Infinity.jpg that the Infinity had some sort of Vaccume energy tech on board, the same kind of technology the Forerunners used to harvest entire universes for energy. What does that mean?
I was wonder the same thing too
Seems like another sci-fi piece of tech like slipspace drives that is theoretically possible in the future.