I need someone to explain the technology of the Elysium space station. For example, in the movie, they have an open atmosphere, so ships can fly right into it. Wouldn't the the vacuum of space would suck it right up? Sure, Earth has an open atmosphere, but, it's held in place by the forces of gravity, gases, and a magnetic field. How would you simulate an open atmosphere on a small scale?
Also, at the end of the movie:
With a thin layer of ionised gas kept in place with a magnetic field, maybe. Same way portals of space stations are done in Star Wars.
I don't know why this haven't been achieved yet is real life, maybe we can't focus magnetic fields that precisely, or without EMI side effects.
Power-out issue: maybe permanent magnets or just a safety, totally separate power line for the atmosphere.