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The Martian (2015) Poster

(2015)

Goofs

Jump to: Anachronisms (1)  | Character error (11)  | Continuity (31)  | Crew or equipment visible (2)  | Errors in geography (4)  | Factual errors (42)  | Incorrectly regarded as goofs (16)  | Plot holes (12)  | Revealing mistakes (8)  | Spoilers (20)

Anachronisms 

Quindar tones (those iconic beeps before and after an astronaut speaks) can be occasionally heard when the crew is communicating with each other and NASA. Quindar tones have not been used since the early 1980s.
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Character error 

On a video call when Commander Lewis' husband shows her the Abba album he bought in a market he states it is a first pressing. The cover shows Fernando at the top of the tracklist but the first pressing only had Fernando as a bonus track and it wasn't listed on the cover. What he is showing is the second pressing.
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A scientist like Watney should have realized that the hexadecimal system he uses with Pathfinder is unnecessarily complex - Watney complained that using a full alphabet would give him only 13 degrees of separation between letters, but with sixteen hexadecimal characters (plus the question mark he adds), there's only 21 degrees of separation between characters, and hence still a high risk of ambiguity. Watney could have made an alphabet with only six characters - NASA could represent 36 different values (all 26 letters and 10 digits) using two characters per value (same as ASCII), and Watney would maintain 60 degrees of separation between characters and thereby eliminate risk of ambiguity. NASA can see Watney, so Watney could have written out an explanation to his base-6 code for NASA to follow. Even if Watney was insistent on using ASCII, he could have used decimal representations of ASCII (three-digit ASCII is only used for lowercase letters and characters he'd have no need of, so NASA could still represent any value with two characters), where he'd only need ten characters and hence could have 36 degrees of separation instead of 23, increasing his disambiguation by 50%. ASCII (and alphabets generally) are not inherently linked to hexadecimal numbers; there's no need to use hex here. Note: Without this NASA would not have been able to communicate the changes to the code of the rover. That code must be in hexadecimal. However, he could have saved one character by missing out the "?". That is also an ASCII character which can be sent using the hexadecimal. This would give 22.5 degrees of arc.
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Hermes crew members twice use the term "altitude control" when they were talking about "attitude control".
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Even if the engineers didn't include it in the procedure, Watney would know to count all the fasteners he removes from the capsule and make sure they're all discarded OUTSIDE the capsule before launch to prevent injury from them bouncing around like bullets inside during ascent.
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Watney comments on Johanssen having Infocom games "Zork 2" and "Leather Goddesses of Phobos" on her personal laptop and then we see the title screen for "Leather Goddesses of Phobos". "Leather Goddesses of Phobos" was purely a text adventure and did not have a title screen as such. The sequel, "Leather Goddesses of Phobos II: Gas Pump Girls Meet the Pulsating Inconvenience from Planet X!" was a text adventure with graphics and had a title screen similar to the one shown.
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Early in the film Watney takes an inventory of his food supply. He counts off packages of Sweet and Sour Chicken and adds them to the list in his notebook. However Sweet and Sour Chicken already appears in the list as the second item down from the 'Dinner' heading.
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Martinez announces "fuel reserves depleted", even though he shut the engines down, meaning there was still fuel to burn.
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When Watney gets Pathfinder working, he responds to the sound of the machinery operating. In the near vacuum of the Mars atmosphere he would not be able to hear it.
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When Mark Watney first attempts to establish communications with NASA and JPL via the Pathfinder, he has a whiteboard panel with, "Are you receiving me?" written on it flanked by a panel to its left labeled, "Yes", and a panel to its right labeled, "No". If NASA was not receiving Mark, how could they ever point the camera at "No" or anywhere else for that matter? Mark should have placed a panel that read, "If you are receiving me, point the camera at the YES panel to the left.". Once the camera was pointed at "Yes", Mark would positively know that communications had been established with NASA. If Pathfinder's camera did not move after a reasonable period of time, Mark would know that Earth never received his transmission and that he would have to redouble his efforts to contact NASA.
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All the hatches in the Hermes are operated remotely, so there was no need to use explosives to breach the ship.
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American flag positioning at first press conference - Old Glory should have been at our left, not on the right. While the flag is on the stage, it is being displayed TO the audience, and the American flag ALWAYS is positioned to its own right - no flag can go to its right.
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Continuity 

The Ares III mission starts in early November, and Mark is rescued after 561 sols. That means that it would be May or June on Earth. Yet people in New York and Beijing watching Mark's rescue are all dressed as if it is middle of winter, not mention, there are snow flurries in front of the CNSA Headquarters in Beijing.
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As shown at the beginning of the movie, the dust storm that "killed" Mark Watney was on Sol 18 (the 18th Martian day of the ground mission). Later when Mark finds the potatoes that he grows and relies upon for survival, they are in a container that has "Do Not Touch Until Thanksgiving" handwritten on the top, it being a team building exercise for the crew to prepare a meal together on that day.

Unfortunately as shown elsewhere and in the movie's advertising materials, surface operations starts on Nov' 8th 2035, which makes SOL 18 at least the 25th of November, which is 3 days after Thanksgiving, and so all the potatoes should have been eaten.
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During the "Elrond Council", when Purnell puts back the pen in Teddy Sanders's jacket pocket, he gives back his own common plastic pen instead of Sanders' Montblanc. Right after, in the following shot, the Montblanc reappears again in Sanders' pocket.
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On Sol 19, when Mark Watney is walking back to the hab after the storm, the rover is shown about 100 feet from the hab partially obscured by a small hill. It is a major plot point that it was parked right next to the hab on Sol 18 and not moved again.
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When Johanssen leaves the control room to get the bomb from Vogel, her shoes go from plain white to ones with the Nike logo.
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Watney is exploring the storage cabinets in the base and then eats while itemising his food supply. There is next a cut to him flushing the toilet in which he seems to have the idea to go back to a cabinet and so he discovers the potatoes. It's clearly out of sequence as he is dressed differently in the toilet sequence and is chewing in the two scenes either side. The assumption is that Scott moved the scene to give emphasis to the idea of planting the potatoes in human waste fertiliser.
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When Watney signs his name on his date board, he adds a broad sweep to the 'y'. When seen in the long shot, it is instead a zig-zag underline.
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Throughout the film, Michael Pena's character is referred to as Rich, but in the closing credits he is listed as Rick.
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When NASA Mission control is watching the supply rocket explode upon ascent, it shows a reaction shot of Mitch Henderson, with Vincent Kapoor being seen behind him. During the shot, we can clearly hear Vincent starting to say "Oh Jesus Christ..." but Vincent is not seen moving his lips or gesturing. The shot immediately after shows him finishing the line, and gesturing.
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When Watney reaches the Hab with the antenna sticking out of his suit, he takes off helmet and upper chest cover. Then he pulls the antenna out of his abdomen and throws it on the floor. Then he grabs some surgical tools and extracts the remaining piece of the antenna tip and takes the antenna out of the surgical tray nearby to match the tip up to the end of the antenna. How did the antenna get into the surgical tray when he had thrown it on the floor?
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During the press release at 00:09:50 into the movie, NASA Director Teddy Sanders calls Mark Watney "Mark Watten." Seconds later, he does call him Mark Watney.
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After the HAB's airlock blows up and Mark climbs into the rover, it is cold inside so Mark's breath is visible and he blows on his hands to warm them up, even though the RTG (radioisotope thermoelectric generator) should be still there. In fact, it would always be very warm inside the rover.
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The launch of the IRIS probe shows an Atlas rocket with a payload faring that is wider than the all-white rocket body (the footage is the launch of Mars Science Laboratory, the "Curiosity" rover). But the breakup is a Delta rocket with a dark rocket body and flush payload faring (footage is from the Delta 178 GOES-G launch failure in 1986).
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When the first satellite images of the Ares 4 site are viewed, Mindy, Teddy and Vincent see only that the solar panels have been cleaned and the rover moved. They should have also been able to see all the equipment that Mark had removed from the Hab to begin growing the potatoes.
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The photo that is taken of Watney doing the Fonz pose is in vertical lines, much like the satellite imagery. However, the camera that took this photo was the pathfinder, which took normal black and white images, as seen in the "Yes" "No" question card scene.
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The MAV is shown with 3 landings legs, in the control room the image of the MAV is shown with 4 legs.
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In Mindy's first scene, the time is presented as 1:30 AM in Houston. She is shown receiving an e-mail from Vincent a few minutes later, but the message is time-stamped 00:35:16 with a tiny GMT above that, which is 12:35 AM in Greenwich, England, and 6:35 PM in Houston the previous day; 7 hours before she receives it. Does it take NASA's internal e-mail servers 7 hours to deliver a 13-line text-only message?
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When Mark gets out of the rover to pick up the pathfinder, the view switches to suit cam, the next view it shows the suit cam pointing skyward, then the next view cam is facing the correctly.
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When the connection with pathfinder is first established the remote station says it has no functioning solar panels and certain sensors missing, while Mark rescues the probe intact. The wording of this boot message exactly matches the boot message in the book where Mark destroyed these panels in order to free the communications section and lift it onto the roof of the rover.
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Right after the Iris supply probe explodes, Director Sanders walks past behind Annie Montrose, and then he shows the red folder to her and walks past her again.
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When Mark Watney is nude and walking away from the camera with a towel around his head, the airlock exit in the large circular portion of the hab is shown directly in front of him. In all exterior and aerial views, the airlock exit is positioned 90 degrees to the right of where shown, parallel to the other airlock.
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The evening timelapse of the rollout of the IRIS resupply mission takes place on SLC-37B at Cape Canaveral as evidenced by the retracting Vertical Integration Building though the rocket in this scene (an Atlas V) cannot launch from there and was added in post. Subsequent scenes of the launch of IRIS were taken nearly directly from the launch Atlas-V serial number AV-028 with the Mars Science Laboratory from SLC-41 a few miles up the cape. The MSL logo was changed and United Launch Alliance logo removed in the one closeup shot of the rocket.
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When Vincent and Bruce are walking into the warehouse, a bicycle rider says hi and rides past them on the side. When the camera angle switches, the bike & rider are on the opposite side.
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Vincent's e-mail is presented to Mindy on Sol 54 with a time-stamp of 00:35:16 (no date), but the bottom of the screen shows SOL 462 19:28:30, which would be the day after the pirate scene when Watney leaves the Hab much later in the film.
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When Watney is recovering his crewmates' waste to use as fertilizer, after opening a bag marked as having come from Dr. Beck, Watney makes a comment attributing the smell to Johanssen.
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After the Iris probe explodes, Annie Montrose turns and walks towards her left several steps. In the very next shot, she is standing right back where she was, behind Vincent Kapoor.
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When Vincent and Mitch are discussing the weight reduction on the Ares 4 MAV, Bruce is in the background removing all the items from the model. Before he is shown removing the control consoles, a shot was inserted in which everything except one seat had all already been removed, so the consoles disappear and reappear.
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When the Hermes crew contact Watney for the first time Martinez says "We just don't like you." What appears on Watney's screen is "We don't like you."
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In a voiceover, Mark states that he can salvage unused hydrazine from the MDV. However, in a shot where he connects a hose to siphon the hydrazine, the craft is clearly labeled "MAV."
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Mark can be seen getting from his EVA suit into a flight suit despite this Mark still refers to it as an EVA suit.
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When Johanssen and Vogel are watching the incoming transmission of the Rich Purnell Maneuver, the screen cuts to Vogel's face after the "Earth Gravity Assist - Sol 227" line appears. We hear three more lines of text appear, however when the movie cuts back to show us the screen, none of those three lines that were heard are on the screen.
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Crew or equipment visible 

When Vogel is catching water droplets in the Hermes to amuse his kids, the belt suspending him to give the effect of weightlessness is visible under his clothes.
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When Watney first wakes up alone on Mars, just as he cuts himself free of the antenna cable, a reflection of someone in a spacesuit can be seen very clearly in his visor.
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Errors in geography 

The coordinates given for The Hab, 31.2°N 28.5°W, are in Chryse Planitia, which is a region just south of the stated location of Acidalia Planitia.
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When Mindy Park receives the Email from Vincent Kapoor (at 1:30 AM) she's asked to check the coordinates at 46.7°N 22°W and zooms right into the Hab, but later in the Cafeteria, when plotting Marks course on the framed picture, when asked the Hab location she points at the image and states 31.2°N 28.5°W.
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The "Chinese space center" is actually the Palace of Arts (Muvészetek Palotája) in Budapest, Hungary. The building is easily recognized, especially because the bridge behind it (Rákóczi Bridge). In the office shots, the river Danube is visible through the windows, with the Budapest Technical University on the other bank. These are all very well recognizable landmarks of the Hungarian capital, although tourists usually don't visit them. For a Hungarian viewer this pretty much breaks the atmosphere of the movie.
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In the establishing shot of the Johnson Space Center, there are large hangers like those used to house the space shuttle. However there are no launch pads in the Johnson Space Center, so such hangers do not exist at the Johnson Space Center.
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Factual errors 

Due to Mars' low atmospheric pressure, the effective wind pressure in martian wind storms is much lower than shown in the movie, very unlikely to be sufficient to tip a spacecraft. Also, the wind on Mars is much too weak to carry large rocks. In interviews, Andy Weir has acknowledged this and admitted that he took creative license with this in order to create the story.

The dust on Mars at the surface tends to be very fine, with grain sizes comparable to smoke particles. There are dust storms on Mars, but they look and behave like puffs of smoke instead of raging wind storms depicted in the movie.
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The film shows Watney following a parachute and shrouds to find the buried Pathfinder lander, but the Pathfinder used a unique airbag system that involved cutting the lander loose from the parachute and Rocket Assisted Deceleration System above the surface. The lander then bounced at least 15 times inside the airbag cocoon before coming to a rest, while the remaining rocket thrust carried the backshell and parachute away from the landing site.
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The gravity on Mars is only about 40% of what it is on Earth. Therefore, Watney and the other astronauts would have walked with a slight bounce, not as much as what you see in films of the lunar landings, but still noticeable.

Also, the astronauts would be able to lift heavy objects with less difficulty, since everything weighs less than half of what it weighs on Earth.
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When Watney first tries to make water using hydrazine, it explodes and he explains it by saying "best guess: I forgot to account for the excess oxygen I've been exhaling." The reaction, however, is limited by hydrogen and he has control over that, so increasing the amount of oxygen won't cause an explosion. Also, Mark wasn't wearing a space suit in that scene, so he wouldn't have added oxygen to the environment while breathing, he would have removed some instead. In the book, the explosion happens when the reaction is oxygen-controlled with an abundance of hydrogen. Mark is wearing a space suit, which provides him with oxygen and dumps out his exhaled air (which contains some oxygen); over a long period of time, excess oxygen accumulated and caused the explosion, so the explanation used makes sense in the book, but not in the movie.
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While the movie portrays the Martian sunset as similar to the Earthen sunset, in reality the Martian sunset has a smaller, less bright sun and sets in shades of blue and pink.
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When Mark ascends from Mars, the camera focuses on his face, with nuts and bolts floating around him. However, those nuts and bolts can be seen floating around before the spacecraft finishes its burn, which would not be possible when it is still accelerating.
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When Mark Witney is seen sitting in a hill looking at the sun after the pressure door has blown off, the Sun looks the same size as it looks from Earth, however, Mars is 1.52 AU from the sun, which means the sun looks about 50% smaller than the scene portrays it.
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Orbits and gravity assist maneuvers don't take much computing power to calculate, are commonly used for all sorts of interplanetary missions and are well understood by most people working at NASA. Taking days to research, using a supercomputer, and needing to be in the same room as the supercomputer are all unnecessary.
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With rover data, we've learned that Martian surface dirt contains roughly 0.5% Calcium Perchlorate. This is a salt that is toxic to plants. Before Mr. Watney could grow his potatoes he would have needed to extract these salts. Also, according to data from the Curiosity rover, martian soil contains roughly 30 liters of water per cubic meter. Much of this water can be extracted by simply heating the soil. Heating martian soil and will liberate significant quantities of water. This leaves only the engineering problem of catching the water and condensing it for use by the Martians. For Mr. Watney, this means the easiest way of making water in the Hab was to bring mars dirt inside, wait a while for it to warm up, and then replace it with fresh dirt.
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Many of the scenes aboard the Hermes show astronauts maneuvering around the passageways with somewhat unrealistic changes in direction. One scene toward the end of the movie shows the Commander making a turn from one passageway to another without touching anything to change direction, which would be impossible in microgravity.
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At various points in the movie, the "head up display" of Watneys space suit is shown, giving environmental and suit data on the atmospheric pressure and oxygen content.

There are two major problems with this:

The suit value is around 4.7 PSI and 21% oxygen. That gives a "Partial Pressure" for oxygen of only around one PSI, which is not sufficient to support life - the minimum for survival is around 2 PSI, with nearer 3 PSI to allow normal levels of exertion.

4.7 PSI is a standard for NASA, but at that pressure almost pure oxygen is used.

By comparison, the HAB pressure are shown as around 12.5 - 14 PSI with 21% oxygen, giving around 2.5 - 3 PSI oxygen, roughly "earth atmosphere" range.

This gives the second problem - dropping from 12.5 or 14 PSI to 4.7 PSI pressure requires a progressive decompression sequence each time, which takes over two hours by the NASA protocol. The astronaut must pre-breathe pure oxygen to purge nitrogen from the body for this time, plus a period of "vigorous exercise" at the start of each pre-breathing and decompression sequence.

Without this, the astronaut will get "the bends" due to nitrogen in the body tissues forming bubbles.
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When placing the bomb on the VAL Door it is attached and Beck says the bomb is set, and a flashing light appears on the bomb. If the bomb is to be electrically detonated by supplying current via a lighting panel connection, there should be no power flowing to the device prior to detonation, and no flashing light.
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When the MAV launches it leaves a billowing exhaust plume more typical of solid rocket boosters despite clearly being powered by liquid fuel engines.
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The first time Mark uses the rover to chat with NASA, it is nighttime on Mars. That means that he is on the side of Mars that is facing away from the Sun. Since Mars is in an outer orbit compared to Earth, the dark side of Mars is always facing away from Earth, whether both planets are on opposite ends of the Sun or on the same end. Pathfinder requires direct line of sight in order to broadcast its signal to Earth. Therefore, it should be day on Mars in order to enable communication with Earth through Pathfinder.
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All measurements were in metric but the rover cam showed "PSI". Pounds per Square Inch.
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Potatoes need to be planted deep, at least 30 cm. When planted shallow as seen in the movie, there is a much higher risk of new potatoes growing too close to the surface, being exposed to light and turning green. When this happens the potatoes produce solanine, a toxic glycoalkaloid. A botanist should know that. Potatoes usually bush from the surface of the ground. The long stems of the potatoes show that these were transplanted to the set and had been grown at a proper depth. The plants are still relatively immature when Watney harvests the potatoes. Harvest should wait at least until the plant starts to die off. This results in a higher yield and potatoes with better storage qualities. My usual yield is about 1 kg per plant.
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After the airlock fails on the hab and Watney covers the hole with "hab fabric" the transparent cover is seen billowing in and out during a storm. Given the low atmospheric pressure on Mars, the flexible plastic tarp would have at minimum half sea level pressure on the inside (the minimum pressure for human activity) or about 7psi, and basically vacuum on the other side. If the circular opening was 6 feet across there would have been at least pi*(3ft^2)*(12in/ft)*(12in/ft)*(7psi) or about 28,000lbs of force on the cover. The flexible cover would have been inflated like a balloon on Earth holding in 7psi over atmospheric, and no wind in the near vacuum of Mars would cause it to billow in and out.
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Martian solar intensity is 1/4 than in Earth. And the roof window in the dome it was necessarily polarized, obscured. Inside the dome, sunlight won't be enough for potatoes to grow.
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According to some NASA engineers, given the Hermes' stated capabilities as a reusable transport for the entire Ares program, the idea of a resupply and gravity-assisted return to Mars would not be a sudden inspiration by a lone scientist, it would in fact be an obvious solution and be one of the first plans NASA would investigate.
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Adding liquid oxygen (-183 C/-297 F) to room temperature sugar crystals (20 C/68 F) would most likely pre-detonate from any jostling. In order to create a safe Oxyliquit explosive, place the sugar and bomb casing on the door out in space to cool before adding LOX, and the added benefit of not carrying a "stick of dynamite" through the space craft.
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As the MAV ascends with Watney the MAV altitude is shown as 1843 m/s, altitude is measured in m not m/s.
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The movie makes the point that Mark Watney would be traveling faster than any human ever had during his ascent from Mars. The escape velocity of Mars, however, is much less than that of Earth, so the Apollo astronauts still hold the record for being the fastest that humans have ever traveled.
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Mark Watney says that if exposed to space without a pressurized suit he would implode, but in fact he would explode.
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During his journey mark spends time sleeping under a wheel in shadow, in reality this would be incredibly cold as the sand he'd be sitting on would be well below freezing. If the rover is cold without heating this should be equally if not more unbearable.
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There are scorch marks on the second rover. Since Mars' thin atmosphere doesn't have any Oxygen, nothing could burn or smolder.
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NASA workers are shown loading the supply capsule using a forklift. The actual device is a 3-story-high CNC robotic arm that lifts cargo packets and inserts them into a capsule to prevent damage to the capsule or its doorways from manhandling cargo inside.
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Teddy's character is identified as the Director of NASA. NASA is overseen by an Administrator. The individual NASA facilities have directors.
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In the music writing credits for "Hot Stuff," Harold Faltermeyer's last name is misspelled as "Faltermeier."
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There is a delay in radio communication between Mars and Earth due to the signal speed and the huge distances involved which spans between 4min to 24min one way. So even at closest proximity between Mars and Earth a message could exchanged only every other 8 minutes, even if every party answered immediately. So real time text messaging as in the movie could not be achieved and Kappoor would never have been embarrassed by Mark asking "Are you receiving?" when failing to respond.
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In the NASA press room, the U.S. Flag is displayed to the speaker's left, and the NASA flag to the speaker's right. This is a violation of the United States Code, 4 U.S.C. § 7(k): ..."When displayed from a staff in a church or public auditorium, the flag of the United States of America should...(be displayed) in the position of honor at the clergyman's or speaker's right as he faces the audience. Any other flag so displayed should be placed on the left of the clergyman or speaker or to the right of the audience."

The display is also in violation of the Code of Federal Regulations, 14 CFR 1221.113, "When the United States Flag and the NASA Flag are displayed on a speaker's platform in an auditorium, the United States Flag must occupy the position of honor and be placed at the speaker's right as the speaker faces the audience, with the NASA Flag at the speaker's left."
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Mark hooks up Pathfinder directly to one of the Hub's batteries. The difference in voltage would have instantly fried the probe.
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When Watney finally controls his perforated glove, the puncture is oriented towards the side. He would not have flown straight. He would have turned uncontrollably. Only when glove puncture is oriented precisely away from his center of mass, he would have flown in a straight line.
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When he needs to cut a hole in the roof of his rover vehicle, Watney says that the geniuses on earth suggest drilling holes in the roof and then hitting it with a rock. There is then a shot of an earthbound genius jumping on the roof repeatedly and finally falling through it to create the hole, followed immediately by Watney jumping on the roof on Mars and falling through the hole. However, the gravity on earth is nearly three times that of Mars, and the weight of the earthbound scientist would create the hole while Watney jumping on it would not exert enough pressure to beat the structural integrity of the roof.
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In the ending scenes on the control room screen the Ares V stage separation happens not later than T plus 47 seconds. It is too early for the burnout of the first stage. And also the flight time not consistent with the altitude what is appear from the on-board camera.
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The American flag hanging inside the JPL building is displayed with the blue background to the observers right, which is a violation of US Flag code. Should be hanging against a wall with blue background to the left.
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When Lewis has Watney wrapped in the tether, Johanssen reports "Hermes Actual, we've got him." The term "actual" is used when speaking to the leader, so only Lewis would have told Houston, "Hermes Actual." Johanssen should have just called themselves "Hermes."
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During text messaging with NASA messages appear letter by letter at the receiving end, just like as if they were being typed. While adding some drama, this would never happen, as everybody knows who has been using text messaging of any kind.
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When the requested photograph of Watney is taken from the Pathfinder camera, the high gain antenna used to control the camera and transmit the image data is not aimed at Earth but is retracted.
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When Watney checks his watch, he pushes on the crown and the watch beeps. The watch is a Hamilton "Below Zero" model that has an automatic movement and does not beep regardless of what is pressed on it.
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When Vogel interrupts Commander Lewis while she is exercising to ask for help accessing an email attachment he received, Lewis says that the attachment is not a JPEG image, and is actually an ASCII text file. The file's contents are first displayed on the screen in hexadecimal, but they do not match the contents of the file when it is displayed in plaintext immediately after.
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Mindy Park receives an email from Vincent Kapoor to look at the HAV, then she contacts security to obtain Vincent's emergency contact number. Contacting security wasn't needed, she only had to reply to his email in order to contact him.
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The Nespresso coffee machine in the Hab is situated directly underneath a shelving unit. This would make it impossible to use as the unit depicted has a handle (shown in the closed position) that needs to be lifted up 90 degrees before a coffee pod can be inserted, and there is not enough clearance underneath the shelf for this to happen. Moreover, the receptacle for inserting a coffee pod is also at the top of the unit which would be hard if not impossible to get to anyway.
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Incorrectly regarded as goofs 

After the airlock was blown away, Watney repairs the breach with a plastic sheet and duct tape. The hole was large enough for an astronaut to walk through in length, suggesting the hole was at least 2 meters in diameter. With an atmospheric pressure of 1 Bar (100 kPa), it would equate to approximately 3.2 tons of pressure onto the seal(if the outside atmosphere is neglected, since it is less than 0.01 Bar). Such a repair would have broken as soon as he tried to pressurize.

Also, this repair is seen fluttering in the wind. Provided the seal would hold the entire 31.4 tons of pressure inside, it wouldn't flutter with that large inequality in pressure, no matter how strong the outside wind is.
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Watney claims that nothing sent on the mission will burn, which is why he has to destroy the crucifix which Martinez had in his personal items. Yet Watney is often shown writing on paper in the Hab and paper, obviously, burns. NASA has developed a form of paper processed from stone specifically so it cannot burn. They sell it to the public at NASA gift shops and museums.
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The failed NASA resupply ship was said to contain "protein cubes" which became liquefied under the effect of the rockets acceleration, but no known protein solid undergoes a phase transition to liquid due to gravity or vibration. The followup query of "why didn't that reveal itself during inspection?" is ludicrous as inspection does not precisely simulate launch conditions, it merely confirms current launch worthiness. Why suddenly liquid protein cubes would cause an imbalance is also a mystery unless they were bulk packed and able to coalesce into a large fluid mass moving substantially within the rocket. (This is exactly what happens in the novel, as the protein can compress while the vegetable oil does not.)
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Air escaping a hole in a glove would push with about the same force as a person generates blowing out a candle. It wouldn't cause violent changes in velocity and would be easily controlled. It would probably be sufficient to push Mark towards the ship, slowly, and he wouldn't want to close the distance all that fast anyway.
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When the crew saved Mark on Sol 561, they said "There's a little smell going on over there, bud". And Mark answered "I haven't had a shower in a year and a half". But, on Sol 461, the last day in the HAB, Mark walked out naked with a bath towel on his body. However, his body does not appear wet and actually seems quite grimy. It's likely that Mark just wiped himself off with a damp towel (just like astronauts on the ISS do), or even just a dry towel, to maintain a minimum of hygiene. In the book, Mark does have baths.
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When Watney is placing his supplies on the trailer before traveling to the Schiaparelli Crater, his name appears on the back of his helmet, like the helmet that got destroyed in the hab airlock explosion. He could have had a backup that had his name on it, or he could have transferred the nameplate, or he could have repaired his helmet with the face shield from another.
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When Commander Lewis finally grabs Watney and everyone is relieved, the puncture in his glove has stopped spewing air. Before puncturing the glove, Watney says he can control it, and does so during his exit from the MAV. So stopping it when he needs to is not a goof.
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When Mark is making the trip to retrieve Pathfinder, he departs no earlier than SOL 79. We cut to Mindy Park and Vincent Kapoor, who very clearly states that Mark has been traveling for 13 days without changing course. This puts the date at SOL 92 at the absolute earliest. At this point, they go to the cafeteria and trace the rover's path on a framed print of that area of the Martian surface. Kapoor makes a mark at the Hab, then asks Mindy where Mark is; he makes a second mark there, then extends the line between those two points to the Pathfinder site. You can clearly see that, based on those points, Mark has covered less than a third of the distance in 13 days. A mere two days later, on SOL 94, he is at the Pathfinder site. One might expect at least another 25 days' travel to reach Pathfinder, if one assumes his speed is constant over the Martian terrain. But it's possible that he encountered rough terrain or mechanical problems with the rover early-on, and sped up significantly during the last 2/3 of the trip.
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When Watney finds Pathfinder, he first finds the parachute. When he digs a little in the sand, he then finds the solar panel of Pathfinder. At the JPL, we see the Pathfinder folded up and unfolded with a three foot mechanical piece on the top of the solar panels that holds the computer and camera. So how did Watney not see this three foot mechanism in the sand first? If it was still upright under the sand as it is shown later after he excavates it, it would have been sticking out of the sand and he would have seen it right away. But considering the sandstorms can knock over a heavy MAV, it's easy to imagine that the Pathfinder toppled at some point, and the panel we see is the one closest to the surface above the buried lander.
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At the end of the scene where it displays the China National Space Administration, a green train can be seen passing by slowly. Under Soviet influence most socialist countries have trains painted green; however it was mainly abolished recently in China as the China Railway High-speed (CRH) service rolled out, and CRH mainly used white-painted Hexie Hao trains, and Hexie Hao can reach a speed of 220 mph, much faster than shown in the movie. What's more, there aren't any railroad near China National Space Administration. However, this movie is set 20 years in the future, so things could change.
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The scenes showing the MAV as it approaches Hermes reveal a heat shield protecting the underside of the vehicle. An ascent vehicle (meant to rendezvous in space with Hermes) wouldn't need heat shielding DURING the ascent, but it would during its descent from Earth to the Martian surface, and it might need it again after a failed ascent with a crew still on-board.
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As Kapoor approaches the JPL building, we see him from inside the lobby, looking through glass doors labeled "JPL." From inside the lobby the lettering should typically be reversed, but both can be correct. The technology for this is a pattern of dots which are black on both faces, then : selected ones are coloured on one face for the "inside" view, and different selected ones are coloured on the other face for the outside view.
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When Ares IV approaches Earth before returning to Mars, the earth appears partially in shadow as a crescent, but instead of darkness the shadow is filled with stars. (1:37:20). Those "stars" are the lights of cities on the night side of Earth.
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When Mark ponders about how to pose for the requested picture, you can see his hydrazine reaction plant in the background still working (flame on top is burning). There would be no need for it at this point of the story any more. However, he would still need water.
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Mark is shown digging up the Radioisotope Thermometric Generator (RTG) which had been deliberately buried in the sand. RTG's must radiate waste heat through their cooling fins in order to generate electricity, burying one underground would have prevented it from functioning. This would not matter, because it was not being used.
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Mark Watney is seeing taking apart the Ares IV MAV, exposing the interior of the top capsule to the Mars Atmosphere. With the airlocks of the entry shaft/storage compartment, containing the space suit(s), still intact, he can safely take off his Mars surface suit, shave and put on his space suit - otherwise his unprotected exposure to the Martian Atmosphere would have killed him pretty quickly.
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Plot holes 

In the MAV takeoff scene in the beginning of the movie, the MAV appears to be very vulnerable to strong storms present on Mars and easily tipped over. It seems unlikely that the 2nd MAV could be placed on Mars for long periods of time and be expected to stay upright until the next mission arrived.
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Deadly radiation, whether from the Sun or from cosmic background sources, is one of the main problems confronting human travelers from Earth to Mars, yet this is never mentioned or dealt with in the film or the book. People on the International Space Station are near enough Earth to be protected by this planet's magnetosphere, but people and potato plants on the surface of Mars would not have any such protection, since Mars lost its magnetic field long ago.
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The Hydrazine fuel that Watney uses to create water by dripping it over a catalyst is extremely toxic. Unsymmetrical DiMethyl Hydrazine (UDMH) and MonoMethyl Hydrazine (MMH) singularly or a mixture of the two, (Aerozine 50) are common propellants desirable because of their stability in long term storage and that when used with an oxidizer like Nitrogen Tetroxide no external ignition source is required. The exposure limit for hydrazine propellant is in the range of 0.05-0.1ppm (parts per million). The drip setup in the HAB kitchen/potato farm would have exposed Watney to a significant, most likely lethal amount of hydrazine especially after the explosion.
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Mark goes to a lot of effort, under directions from NASA, to cut a big hole in the roof of the rover so that he can take along the additional stuff he'll need on his long drive, and live in it. The stuff is bundled up in a tarp and strapped to the roof of the rover over the hole. The contents might be accessible through the hole, but then nothing would be holding them up. It doesn't look like additional living space. He goes outside every sol anyway, so the items could have just been strapped to the roof of the rover without the hole, or on to one of the trailers, without destroying the strength and security of the cab.
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Watney's specialty is botany, yet he has been sent to Mars with no plants to grow.
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The Hermes has a rotating joint to connect the stationary center hub with the rotating spokes and rim. Such a joint would be very complex, expensive and a high risk of failure. Also, it makes navigating the inside of the spacecraft harder for the astronauts because they have to catch a moving spoke. If the center hub was fixed to the spokes and rim, the astronauts would just turn with the hub and they wouldn't notice it. They could then just turn into a spoke that's not moving. Such a superfluous joint would never exist on a real spacecraft.
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The Hab's (apparently) only communication antenna that can contact Earth is torn away and likely destroyed in the storm, and anything on the MAV is gone, so Mark is left without any means of communication, until he gets the lander. The MDV is stated to have at least 3 communication devices that can contact the ship in orbit, so it would also be able to contact the satellites in orbit, which contact Earth. The MDV is sure to be able to contact Earth directly, as well as both the working and broken rovers, and the Hab would have had more than one system. Out of all of those other things that would certainly have been able to "phone home".
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The air lock blowout is shown as a blow-in, since the rupture is shown from the inside according to the curve of the black structural ribs, and the Martian atmosphere and condensation is blown inwards. The pressure inside the Hab would always be much greater than the pressure outside, so the rupture would have blown outwards. It would also be much more likely to happen within the airlock, in the area between the two doors, where the strain on the walls (which look flexible, but are never shown to flex as the pressure changes) changes with each pressurization or depressurization, than on the Hab side of the inner door where the pressures would be constant, but there's an outside chance that it could have been coincidence, bad luck, and/or the airlock jiggling as it cycled.
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Martinez announces that he's shutting down the MAV's 2nd-stage engines, even though he knows the capsule isn't high enough. He should let the engines burn all their fuel.
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The Chinese launcher is classified and believed not known to the USA. So revealing it would be a Politburo decision, not one that scientist-administrators could make on their own. It should have had them going to ask permission.
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There have already been experiments in growing crops in space. It is unlikely that this wouldn't have been done already for Mars.
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When Mark leaves the hab to travel to the Aries 4 site, he says (and it is repeated by Vincent on earth) that he was not expressly given permission to board the MAV, making him a pirate. In the novel, at that point he had lost communications with earth so it made sense. They never show him shorting out pathfinder lander and losing communication with earth in the movie so it should have therefore been possible for him to get permission.
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Revealing mistakes 

Spaceship Hermes has a rotating mid section, where centrifugal force generates "artificial gravity" inside. However while in deep space, a brief shot shows Vogel walking in the background. His body axis is pointing straight upwards, indicating external gravity, when it should be pointing towards the rotation axis of the mid section as seen in other shots, making the body appear to be "tilting". One can even notice he is walking downhill by the small, stomping steps he takes. Such goof is visible in 2001, too, aboard the Space Wheel.
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When the video file from Mitch Henderson arrives and everyone is gathering around the monitor, Vogel walks towards it as if walking down an incline. At any point in the Hermes gravity wheel, everyone would walk like they are on a level surface.
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In the microgravity section of the Hermes, astronauts exhibited non-ballistic motion while making right turns from one tunnel to another. They shouldn't be able to just turn their bodies in midair.
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Mark Watney wants to record a video log for the first time after the movie opening. He sits down and starts typing his name and password. The letters appearing as he is typing them, however, do not match his hand and finger movements. It is rather a pre-recorded video sequence (or someone else is typing for him). Also, moments later when video starts, this isn't a live stream from the camera in front of Mark, it's a pre-recorded material, as is doesn't match the reality; Mark's hand is right above the keyboard, his wrap does cover the table a bit, and there are no maps in front of him. In the video recording shot, however, Mark's hand is at his chest and there are maps on the table. Not to mention that the camera angle doesn't match the video feed.
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It is quite amazing how much consumer products are used in the Ares mission: astronauts' shoes by Nike, AOC monitors, GoPro cameras, etc. Significantly, on Hermes Beth uses a very large AOC monitor with touch capability, which AOC does not currently make, and Mark has a regular Hamilton watch on his EVA suit with analog hands and a date window which would be fairly useless on Mars.
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The Hab should be EMF-shielded to prevent radiation exposure of the crew as Mars has little natural solar or cosmic radiation shielding, however the rover part of pathfinder, non-functioning in the book, can be seen roving the Hab in the closing days before Mark's journey to Aries IV.
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When Watney gets out of the Rover when he first arrives at the Pathfinder site you can see the rover through a gap between the bottom of his helmet and his suit when you look through the face plate of his helmet. That area should have been sealed from the near vacuum of the Martian atmosphere.
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When Mark is brought aboard Hermes, crew members Beth, Martinez and Vogel arrive at the airlock through a section of the ship which is still vacuo as the VAL outer airlock has not been sealed yet. If it could have been opened or closed remotely then Beck wouldn't have had to place the bomb and traverse the exterior of the ship.
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Spoilers

The goof items below may give away important plot points.

Continuity 

After deciding to go and rescue Mark Watney, the Hermes crew is evaluating their resources. The maximum tether length (to reel Watney in) is discussed to be 214 meters "connecting all that we have". When the scene unfolds, the tether is on a roll and in one piece, and does not consist of connected pieces.
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When NASA is in a video chat with the JPL scientists regarding making the Ares IV MAV lighter, a model can be seen behind the main JPL scientist. In one shot, the interior of the model is seen with nothing but one seat for Mark Watney. The next shot of the model shows the interior with a control module and other parts that get removed.
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Factual errors 

The only way Watney could use a punctured glove to move through space is with the hole pointing away from his center of gravity. For example, he could put his hand in front of his bellybutton, with the hole pointing forward, and let the escaping air push him backwards. (Someone else would have to radio directions to him, such as "More towards your head.") Watney could not move through space headfirst, with his arms at his sides like Ironman, unless he punctured both left and right gloves.
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Two astronauts entangled in the tether and spiraling from the thrust of the leaking glove should spin faster and faster as the tether gets shorter. This is the same physical principle which causes an ice skater drawing her arms against her body to spin faster.
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When Mark reaches Ares IV, he exits the rover and while the door is clearly open the tarp he installs in the roof remains inflated, when it actually would have depressurized immediately.
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When the Hermes is first shown approaching Earth, dialogue indicates that it is on its deceleration burn. As shown, the spacecraft is burning prograde instead of retrograde. This would only make sense after the decision to accelerate and slingshot around Earth, which hadn't happened yet.
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During the rescue, when the commander has grabbed Mark, the tether forms a halo around them and maintains this shape as they are being pulled in to the ship. The tether loops should be held back by momentum to trail behind them.
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Mark Watney's funeral service appears to takes place in an American National Cemetery, but all of the headstones are Latin crosses. They should be simple slabs with rounded tops. This scene was probably shot in Hungary; European WWII cemeteries typically use headstones in the shape of the desired symbol.
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Another error has to do with Watney controlling the escaping gas by making a fist. Were he actually able to do that, he would not have needed to continue releasing gas once he had momentum. Continuing, as he did, would have made his speed relative to the commander exceedingly more difficult as it increased moment by moment.
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During his exit from the MAV, air can be heard hissing from the punctured glove. But in space, no one can hear you scream, or your suit leaking air. The sound would only be audible inside the suit's artificial atmosphere - not in open space.
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The rescue scene is replete with errors, but several obvious ones relate to Watney's punctured glove. First, the moment he breaks the seal, his arm might have flopped around, even causing his body to spin wildly. It would not be possible, however, for his entire body to be launched, even if the escaping gas actually created the necessary force.
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When Mark opens the vacuumed bags of human waste, he complains about the smell. The smell comes from bacteria decomposing the organic matter. Since the waste has been exposed to near vacuum, all the water boiled off and also deep frozen, there wouldn't be any bacteria left. Hence the bags content wouldn't smell.
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For Mark to use the escaping air at his glove, he would need to have to align the thrust vector, his center of gravity and his target on one straight line. The way he has his arms stretch out to the side would only cause him to spin wildly.
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Incorrectly regarded as goofs 

The film seemed to imply that NASA communicates with deep space probes by working with identical spacecraft on Earth, as seen in all of the Pathfinder scenes. In fact, data is sent and received via the Deep Space Network and would not involve any spacecraft replicas on Earth. This may have been inspired by, or confused with, JPL having vehicles similar to the Mars rovers available on Earth in case they need to test a tricky maneuver.

They are using it to imitate the area around Pathfinder in order to decrypt the messages.
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In the rescue scenes towards the end of the movie, a live news broadcast is being conducted at NASA following the astronauts every move. It seems as if the reporter is updating the world audience in "real time" which is impossible, due to the 12 minute communication delay. It is likely that the reporter is reporting live based on the communication as it is arriving to Earth. The editing shows this concurrent with the action above Mars to enhance the drama.
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Plot holes 

Opening the airlock door by overriding its safety mechanisms would have been more effective & safer than destroying the door, and it would have allowed the door to be closed and the compartments re-pressurized.
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An essential part of the plot are the MAVs. First to justify leaving Watney behind and then as the astronaut's rescue ship. However, if the MAV can tip with a severe storm, which is something that should be able to be predicted, how can the MAVs be sent years before the respective manned missions and never tip?
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If the Hermes crew could create an explosive to be used as a bomb, it would be far safer & more-effective to use it as propellant fuel to slow the ship, rather than to intentionally damage the hull.
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For the same reason that Watney's ribs broke during ascent (loss of bone density due to micro gravity), the entire Hermes crew would have suffered debilitating bone loss during the trip home without the use of the now-depressurized gym on the rotating deck. Hermes was only depressurized to slow it down, then re-pressurized. Other wise, the crew would never been able to greet Watney when he came back aboard the Hermes.
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During the rescue sequence, the commander takes off connected by the tether, knowing Watney was approximately 1000' away. In her role she would certainly have known the tether was no where close to long enough.
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