Another eerie factoid to add is that with the Hive's ability to manipulate dimesional space the actual interior of the Dreadnaught could be much MUCH bigger, i mean look at Crotas pocket dimension on the moon, we drop down into a darkened area through a portal that leads to castle floating in nothingness with its own dead star but from other perspectives the "area" we are falling into is just a pit that ends near Phogoths summoning chamber. Food for thought while exploring lol.