Add Yahoo as a preferred source to see more of our stories on Google. An astronaut saulting the American Flag on the moon in Apollo 18 - Lionsgate Many, many movies have been made about space travel.

Characterized by a focus on scientific plausibility and technical detail, the hard sci-fi genre has produced some of the best movies in recent memory.

Patricia Skelton, an astronomer at the Royal Observatory Greenwich, sheds some light on the scientific rigour of her ...