This is a movie to watch for its entertainment value not for a study in the laws of physics. It's science fiction not science reality. That said this is a female empowerment movie. The lead does all the real fighting and saving whereas the men either die or offer support so she can do her thing. If that offends you then this movie is one to skip. Maybe that's the only offensive part, aside from heavy use of expletives. And the lack of explanation for the vanishing ground crew ramper, the sudden appearance of The Fool's Errand, and Chloe's frequent flashbacks or perhaps premonitions of things that do not occur. Oh. And what's with the 'father' being so brooding and emo. Almost fulling the stereotypical frail feminine role of yesteryears. Major role reversal. A bit annoying but still a likable movie. I'll probably watch it a second time just for kicks despite these annoyances. Kudos for making a movie in this day and age without explicit sex. Four stars for that alone. Would give it five stars but there are too many unanswered questions that perhaps were left on the cutting room floor.