 PLOT: During the staged "phone call home" scene, the capsule is  supposed to be still in Mars orbit. Nevertheless the astronauts chat  with their wives in real time. This would be a pretty silly mistake  by the conspirators, since light waves from earth need a couple of  minutes to reach Mars (and everybody who works for NASA knows this).  Thus, if the conversation really was held in this manner, everybody  would know immediately that Capricorn is a hoax.