After the transmission blows on the asteroid causing Harry to be thrown about 15 feet away, in the very next shot when he is asking God for a little help, we can see that he is suddenly standing in front of the spinning drill bit head. How did he pick himself up and get back there so quickly? [This is not Harry who gets thrown back, it is Chick watch when Rockhound goes over to him look at his face.]

When AJ is down getting the liquid O2 and they have to evacuate, fire blows up the tunnel and engulfs him as he is climbing out, yet even though his face is uncovered, he is not burned. [It's a quick flash of fire so it passed him very quickly, plus he was wearing protective clothing]

In the scene with A.J's Armadillo, you can clearly see the shadow of one of the cameras in the smoke behind them. [This is not a camera its the big gun mounted on the side of the armadillo.]

During the opening titles after the asteroid hits earth, the fireball spreads out around the world and the camera angle shifts across about 10% of the earth's surface, and suddenly the fireball has progressed almost completely around the entire world. It wouldn't have happened anywhere near this quickly, and its appearance would have changed as its intensity diminished. [We can safely assume that the director of the film did it this particular way to add drama to the opening sequence of the film and to add special effects so that the audience can see what once happened.]

For the first time civilians wore genuine NASA spacesuits. They cost over 3 million dollars each. [Close, but no cigar. Christa McAuliffe, who flew on the doomed Challenger flight in 1986, was a civilian.]

If "NASA doubles up on everything.", why didn't the nuclear bomb on Independence go off when it crashed? Colonel Sharp stops Stamper from hitting their bomb with a wrench since it would set it off, so why didn't the one on Independence detonate? [A crash wouldn't set a nuclear bomb off; it takes a very precise set of events to occur for that to happen, which a crash couldn't possibly replicate. Nor, for that matter, would hitting one with a wrench, which Sharp undoubtedly knows, but with the fate of the Earth riding on that bomb, he can't risk Stamper damaging it. The easiest way to ensure that he doesn't do it again is to tell them that it might actually go off. It's not true, but Stamper and his men aren't going to know that.]

Liv Tyler's real-life dad, frontman of Aerosmith Steven Tyler, wanted to do the song "I Don't Wanna Miss a Thing" especially because his daughter was in the movie. [I am an Aerosmith freak and I know this is not true. I've seen 2 separate interviews by Steven Tyler and in both he said he did NOT want to record the song because it was too sappy. He only agreed after watching the ending sequence where Liv grabs the screen and says "Daddy" while she is crying. The ironic thing is the song became the first no. 1 hit Aerosmith ever had.]

One of the things the creators of the movie did not think out is the issue of the asteroid's gravity. There are several problems with that. It is stated that the asteroid is the size of Texas. Even if we assumed it to have had 1000 miles of diameter (a really huge asteroid) and the same density as Earth it would have gravity of about 12% of Earth's gravity. In the movie it can be seen (even though stated otherwise) that the teams operate under earth-like gravity – tools, piping elements, debris all fall down with quite an acceleration. Also the astronauts move about very conveniently – much more easily than would for example on the Moon. On the other hand if we assumed that the asteroid had much higher density, which allowed it to had significant gravity, a near passing (a couple of hundred kilometers) of such a massive body alone would probably wipe out humanity just as efficiently as a direct hit. Even if we assumed that the asteroid's diameter was only 500 miles and its density was about the density of the Moon, the near passing of its two halves would wreak havoc on Earth as the influence of their gravity on, for example, ocean tides, would be up to 20 times bigger than Moon's. [The mathematicians at NASA would have taken the fragments into account and set up the "zero-barrier" sufficiently far away. This is why the earth sees no effects from them. And gravity is increased due to the asteroid spinning.]

The scene where the crew boards the twin ships and then the starting sequence strongly suggests that the shuttles are launched from pads located very close to each other. With all the air movement, heat, fumes and dust generated by the powerful engines of the spaceships it would be extremely dangerous to launch two spaceships simultaneously and so close to each other. I cannot believe NASA would ever allow that - especially with so important a mission. [Only if there were people in the immediate area, and there certainly were not. The ships would not be a danger to each other, either.]

I find it highly unlikely that all of those astronauts would have gleaming white teeth. [I'm not sure that "highly unlikely" would constitute a movie mistake. Highly unlikely still means it's possible in the context of the movie.]

En route to the asteroid, the two space shuttles head to the Russian space station to refuel. To simulate gravity, the cosmonaut aboard the space station fires a few rockets to put the space station into the spin. How fast does it need to spin to reproduce Earth gravity? Assuming the space station's spoke arms (where the shuttles dock) are about 50 feet long, the answer is 8 revolutions a minute. That makes it impossible to dock - it'd be like trying to drive a car on ice-covered roads into a spinning parking garage. There's another, more fundamental, problem: the artificial gravity points in the wrong direction. Think of spinning rides at the amusement park. The spinning motion creates an artificial gravity, an effective outward-pushing force. On the space station, the spinning would tend to throw the astronauts down the station's spoke arms and back onto the shuttle. Also, the artificial gravity would taper off to nothing at the centre. But the movie's artificial gravity somehow points down, not outward, and appears to work equally well throughout the station. [The space station does not have to be spinning 8 RPM, as it does not need to simulate earth gravity exactly. Half a G would be more than enough to make it possible to walk around without floating. Even at 8 RPM it would not be impossible to dock. In 1975, Apollo and Soyuz spacecraft docked for the first time, and over 44 hours split and redocked at least twice. This was with an HP-65 handheld computer being used for calculations, with mission control as a backup. Nowadays, an average desktop computer has more computational power than what was in Apollo. The two craft were approaching each other, but had to maneuver to line themselves up and match rotation. If it could be done in 1975, it's more than possible to do it now.]

When Truman is describing the shuttle's characteristics, he mentions that they are made of an "impenetrable titanium alloy." When AJ, Bear and Lev are in the Armadillo on the asteroid in the crashed ship, AJ shoots through the supposed "impenetrable titanium alloy" with the Armadillo's machine guns. It's doubtful that even the impact of the crash would weaken the apparently impenetrable alloy to a point where it could be simply shot through with those guns. [There is no such thing as "impenetrable". He was speaking about a hull which could not be breached by anything they would expect to encounter in space. Firing a Gatling gun at point blank range in a vacuum - there is nothing in the universe that would be "impenetrable" to that.]

If the asteroid has a new rotation axis after passing the Moon the drill teams wouldn't have missed their drill sites by just about 20 miles, they would have ended up elsewhere, but not near their landing zone because the landing zones would be elsewhere obviously. [The rotation may not have been that much, so it wouldn't move very much between the time it passes the Moon and the time they land. Plus, the were probably on computer guidance and the computer would compensate for any rotation. He missed their landing side because he had to pull up to miss a big hunk of the asteroid sticking up. So, he over shot it, not off left or right.]

It took approximately 18 hours from the time Harry and Grace left the oil rig until they decided to help save the Earth. How did his entire crew have time to become scattered across the US? AJ even had time to start his own oil company. [The crew came from all over the country so it seems natural they'd want to go home during their break. Commercial airlines provided the means to get where they were going. AJ probably bought an existing rig, and just put up a sign. Doesn't mean the deal is finalized yet.]

When the crews board the shuttles, it is daylight, but when they are about to take off it is dark. Seeing as Truman told them they would be taking off at 8 am, it doesn't really make sense that it should be dark. [When Truman is explaining the mission (during which he describes the "Roadrunner Thrust Maneuver") he states that they will be taking off at 6:30 p.m. Depending on what time of the year it is, it could be dark at the launch.]

Several of the crew are strapped into seats that are far too small for them. There is absolutely no support for their heads. The seats end at their shoulders. When they hit the 12 G's around the moon the weight of the helmets will guillotine their necks. [This is incorrect. You can see both Oscar's and Rockhound's headrest while they are being strapped in. Since they are not upright, their weight may make them higher on the seat. But, when they are doing the "Roadrunner Thrust Maneuver" you can definitely see the headrest of everyone they show. They are black, so they may just be hard for some people to see but they are definitely there.]

In the scene where the asteroid is about to hit Paris, look closely at the clouds. They don't move. An asteroid coming in at that speed and force would blow the clouds away. [If you are talking about the clouds that you see right before the meteor hits the ground, those clouds could be miles and miles in the distance. You can't say that an asteroid of that size and at that distance would affect the clouds.]

If the movie was set in the summertime, why was the 6:30 pm launch done after sunset? Even if was AM, the sun would have still been up at 6:30 [In aviation, pilots use Zulu time, the time zone at Greenwich, England. 0630 Zulu time would be 5 hours later than time in FL, 8 hours later in CA. So, if the time was 0630 Zulu, it would be 0130 in FL, and 2230 in CA, both well after sunset.]

In the scene after AJ, Bear and the cosmonaut do their Evel Knievel jump across the canyon; one shot shows AJ opening the hatch of the Armadillo whilst Bear relaxes in the front seat with his helmet off. How was he able to breathe when all the oxygen escaped the Armadillo? [The hatch to the outside could be in a separate pressurized compartment that allows one to leave without disturbing the others.]

In the scene where the Russian space station starts to collapse A.J and the Russian cosmonaut gets trapped in a room. In order to check that everyone has reached their respective ship Houston turns on a "personal radar" which lets them see everyone in the station in a 3d-model on screen. This is done through trackers in the Americans space-suits. Only problem is that the cosmonaut also shows up on radar and he, apart from already being there for a great period of time, definitely does not have an American space-suit with a tracker. [Since the image sent back is 3D, that implies there is some sort of sonar-ish signal emitted from the trackers. These signals would bounce off of the cosmonaut same as they would anyone (or anything) else.]