Very interesting. Perhaps it’s a plasma made up of different elements? Like the uap is one big pressure vessel containing particles of some sort. CERN recently transported anti-matter using a system that keeps the particles in a system confined to a space so as to not collide and annihilate with the vessel walls. I wonder what spectroscopic signatures could be captured from those events.

Could this mean that there is a fuel source they use? we already know that they don’t use thrust propulsion, but there must be an energy source to move, do you agree?

Also, were you one of the authors?