Prometheus: An Unanswered Question

According to Weyland (Guy Pearce with incredibly awful make up) they spent 1 trillion dollars on the trip to planet Lv-223 and as we know things didn't quite go to plan...and it ended in what the media today would have called the 'biggest disaster of all time'. One would imagine that the crew of the Nostromdo would have known about this as it would have been the biggest thing in history?? Would it have not occured to them to talk about it when going down to the LV-446?Just a thought?PeaceNeil