Factual error: The ship, VIRGIL, is diving straight down from the crust to the core. Although the interior of the ship pivots to make the cockpit perpendicular to the descent, the ship itself is "digging" straight down so when people move from compartment to compartment they should be climbing up and down rather than simply walking back and forth.
Factual error: When 'Rat' is trying to hack into Project Destiny control, he gets several '404' errors, but '404' is page missing, not access denied. It should say '401- Access Denied'. (01:56:19)
Factual error: When Victor and the crew are 2600 miles below the surface and Rat is trying to let Dr. Keyes know that Project Destini is going to happen, he contacts the ship via radio and even transfers computer data to the ship. This would be completely impossible because the ground would block any radio signals from reaching the ship. By the time the ship had reached about a mile down, there would be no radio contact whatsoever, no matter how powerful their transmitter was. Audio communication would be unfeasible too - the ship would make too much noise cutting through the earth to allow for any communications to be transmitted through solid rock.
Factual error: When the Golden Gate Bridge is destroyed by the sun's unfiltered rays (ya, right) the two towers of the bridge lean in the wrong direction. When the middle of the bridge is gone, only the tension from the anchor wires (connecting to land) would remain and they would pull the towers outward. However, in the movie the towers lean inward. (01:27:40)
Factual error: When they realize they need to make the last nuclear explosion 30% bigger, they simply pull the fuel rods from the reactor and set them next to the bomb. This is ludicrous, a nuclear bomb is a carefully engineered piece of equipment, with carefully shaped charges imploding the radioactive material. Setting some fuel rods next to the bomb will accomplish nothing.
Factual error: When Becca is waiting to be called before the flight review board and while standing in front of the board she is wearing earrings that hang below the bottom of her ear lobes. Military regulations only allow small spherical conservative earrings centered in the middle of the ear lobe.
Factual error: In the very first shot of the movie David's watch shows an invalid time. If it were 10:30, the hour hand would be between 10 and 11. The hour hand is exactly at the 10:00 mark even though the minute hand is at 30 minutes.
Factual error: At the beginning of the movie, the space shuttle is landing off course and they only have moments to figure something out. This makes no sense. Shuttles take a long time to land - about an hour from the time of the reentry burn to touchdown. After the burn, reentry begins about a half an hour before touchdown. There is at least 20+ minutes of glide time. Surely somebody would have noticed they were off course a lot sooner than they did.
Factual error: The scientists were surprised that the space suits were able to withstand the intense pressure encountered when they were walking around in the geode 500 miles below the surface of the earth. They should have been - the suits were made of flexible materials. No matter how heat resistant they were they would have to be completely solid (like the white deep-sea suit worn by the bad guy attacking Bond in "For Your Eyes Only") to provide protection from thousands of pounds per square inch of external pressure. The scientists should have been crushed like eggshells the second they stepped off the ship.
Factual error: While Dr. Brazzleton is turning the hydraulic gear, his glasses fragment. If it was hot enough in his helmet to fragment his glasses, then his face should've been burned. (01:44:45)
Factual error: When Dr. Keys is giving a lecture, he mentions that sound waves gain wavelength and lose frequency as they enter a denser medium. That's not completely true. Sound does gain wavelength, but frequency NEVER changes. It is velocity and wavelength which change to maintain the relationship velocity = frequency x wavelength. It is impossible for frequency (no. of waves per second) to change since that would mean waves get lost or created from nothing.
Factual error: In a few shots through the movie the gauges or screens displaying information, they use "PPI" for pounds per sq. inch instead of PSI. PPI is wrong it's always PSI. The first time you see it is in the scene when they just launch the ship right before they pierce the crust with Braz and Serge for sure.
Factual error: It is claimed that the Unobtanium shell doesn't conduct heat, but gets stronger from it. If it can't conduct heat, then how do they solder the thermocouple to it and obtain electricity? If the wall could conduct enough heat for the thermocouple then it would have had to have been hot enough to roast the two crew alive.
Factual error: If you are in the military, you will note that all of service dresses worn by army and air force officers have their U.S. insignia pinned onto their collars incorrectly. The insignia is supposed to be pinned so that the letters are parallel to the ground, not parallel to the bottom collar. It's a complete myth that movie uniforms are frequently deliberately incorrect to avoid prosecution, so that's not a valid reason.
Factual error: When Eckart is decrypting data from Qualls using primes, the first number he enters is '1', which is not prime. [Some people have debated this, saying that as primes are any numbers not divisible by any number except themselves and 1, 1 must be prime. While it technically fits the description, 1 is generally considered NOT to be prime (http://www.utm.edu/research/primes/lists/small/1000.txt)].
Factual error: The view of the Earth at the end of the movie while the credits are rolling shows a sunrise line advancing in a direction that appears to be east south-east.