My five-starring this was probably knee-jerk, spun as I was by the fresh-faced awe I experienced as a nerd seeking to recapture the nerd-awe of the planet spinning to a pin-prick, the harsh little port window into the black, the hard line of the imagined horizon with a tiny, space-suited person for mote-like scale. Science fiction nerds, this one anyway, live for the airless consideration of airlessness, a turning orrery of possibilities and the problems that underpin them. Which, oorah, this delivers.