In the scene near the end where the crew of the Messiah are talking to their families for the last time, they are talking to 'Earth' via satellite. When they are talking and crying and telling each other they love each other and that crap, their responses are immediate. But when the NBC news was showing live coverage of the Messiah nuking the comet, the reporter says there is a 20 second time delay on the pictures from space. Even though the crew had flown closer to earth near the end, there would still be a satellite delay, and therefore the crew and families could NOT talk to each other as they would face to face. There would be a delayed response. It happens all the time when new reporters go LIVE from an event far away from the studio. You get what I mean!