A hune is an organ, perhaps unique to the spacefaring Byakhee species, and is capable of providing ease of movement in both vacuum and within atmosphere.
It is described as allowing the Byakhee to levitate in atmosphere, and move up to superluminal speeds in the vacuum of space.
It is unclear what mechanism could provide for such abilities. However, it is possible that by some unknown means the hune can manipulate and harness magnetic fields of both planets and stars. This field manipulation could explain the apparent levitation, and perhaps explain some of the mechanism by which the Byakhee achieve the acceleration needed to reach faster than light speeds.