Revealing: While the guys are going for their physicals, there's a scene in which blood is drawn and you can clearly see the tube connected to the end of the syringe pumping fake blood into the container.

Factual error: At the end, the russian satelite is aimed straight at the moon. It couldn't have been done that way, and if they did aim at the moon, they would have had to aim to where it would be in 3 days.

Continuity: This line of thinking is repeated twice, once by the NASA scientist and once by the Tommy Lee Jones character: "To get to the moon, you only have to go halfway - gravity will take you the rest of the way". Actually, since Earth's gravity is 6 times greater than the moon's, you would have to go 6/7ths of the way, otherwise you return to Earth.

Factual error: A couple of times during the film, someone exclaims in horror that if this-or-that system fails, they will have to land the shuttle dead-stick (unpowered; no chance to veer off and try again). Actually, all shuttle landings are dead-stick; they are computer guided but nevertheless are unpowered, one-shot deals.

Continuity: When the rockets blasted on the Russian satellite, it should have cleared all the debris surrounding it.

Factual error: At one point, the rotating solar power panels on IKON slam into the Shuttle, wrapping around the nose. That's bad for the astronauts! The tiles all over the Shuttle are used to absorb the tremendous heat of reentry. They are also very brittle. An impact like that would have torn them off by the hundreds, making reentry impossible.

Factual error: In the shuttle landing sims, the pilot is flying, not the commander.

Continuity: During the climactic landing sequence at the end, the point of view shifts rapidly from head-on to alongside and back. Watch carefully at the first side-on view just as they're touching down; the nose of the shuttle says "Columbia". When it switches to the next head-on view, the wings say "Daedalus".

Visible crew/equipment: You can see reflections of film crew and lighting boards in Clint Eastwood's sunglasses several times during the scenes where he is gathering the old members of team Daedalus.

Plot hole: When the astronauts finally get to IKON, everyone is amazed at how big it is. Now come on! Russia begs the U.S. to fix their satellite, NASA spends about a billion dollars getting a mission up there, man-years are spent training astronauts, and they don't even know what the satellite looks like?

Plot hole: Clint Eastwood orders everyone to bail out, since his landing is likely to be a spectacular crash. Donald Sutherland blows the hatch and obligingly throws out the two disabled astronauts, though he and Garner stick with Clint through the hairy landing. In all the excitement, Clint forgets to tell NASA that two unconscious guys are now descending into the ocean by parachute, and must be rescued before they drown.

Other: During the landing, when Jerry is getting Ethan and Roger out of the shuttle using the escape pole, the two people going out (presumably the stuntmen) look to in fact be jumping out the hatch, instead of just being pushed/thrown by Jerry.

Factual error: The flight director talks directly to the crew several times. In order to avoid a lot of confusing chatter, only CapCom can talk to the crew.

Factual error: They only have a month to train. In that time they would train for the mission and just let a trained pilot/commander fly. Also, they wouldn't take time out from training to go to CA to be on Leno.

Continuity: When Frank is stopped in the lobby after leaving Gerson's office if you look out the window behind Frank you see a couple walk by, a woman in a light suit and a man next to her. The shot than shifts to Gerson and back to Frank, you again see the couple walking by, within 30 seconds.

Factual error: In many scenes in space, the stars are shown twinkling or flickering. This occurs only when seen through an atmosphere.

Factual error: The X-2 only had one seat. In fact, I don't believe there were any two-seater "x-planes".

Continuity: The character Jerry, played by Donald Sutherland, snaps off one arm of his sunglasses that the doctor gave him. He uses it to assist him in fixing the door that was jammed shut. When they are suited up and coming back to Earth it shows him with the sunglasses back on from both sides of his head and the arm is on the glasses, not broken off anymore.

Continuity: In the first fifteen minuets of the film, Marcia Gay Harding's ear rings keep vanishing and reappearing.

Continuity: In the opening shot of the NASA people, they are wearing I.D. tags that have the date of 11-99.  But just days later Clint Eastwood's tag is a year higher, showing 11-00.