But what really makes me wonder is the captains wheel on the Prometheus.
How do they get the elves, unicorns and pixie dust underneath a standing captain on a glass-bottom bridge?
Don't be silly. The elves, unicorns and pixie dust do not physically hold objects to the floor...they create the magical field that permeates the ship, creating the artificial gravity. Geez, everyone knows this.

But what powers the Prometheus engines, you ask?