Question: Mark says he will have to get to the crater, which is 3200 kilometers away. Mark says he has one working rover, designed to go a max distance of 35 kilometers, before the battery has to be recharged at the hab. During the nighttime scene, he says he has doubled his battery by scavenging Rover 1, but if he uses the heater he will burn through half his battery everyday. I did some math, and worked out that the max distance his rover would be able to go without using the heater would only be about 140 kilometers. How would he travel 3200 kilometers to get to the crater?
Question: #1 Wouldn't the space suits used on Mars have a heating device built into them, being it's so cold on Mars? Why did he have to rely on the RTG for heat in the rover? #2 Just before lifting off from Mars we see Watney cutting his hair and beard. He appears to be in another Hab, but when he's approaching the MAV in the rover, there's no Hab in site.
Question: How can you tell the speed of a spacecraft from the inside when there is no way to measure it in relationship to anything else?
Question: Mark finds pathfinder, and takes it back to the hab, and recharges it. Wouldn't he have to repair it first? The rover is very old, and hasn't been used in decades.
Question: How did Mark manage to make the hab last longer? He said he was in a hab designed to last 31 days.
Question: The gravity acceleration on Mars is 3.71/ms2 a little more than double our Moon and approximately 1/3 of Earth gravity. For this reason every falling object or walking/running people or bouncing object should be attracted to Mars in a "slow motion" fashion. Watching the movie I didn't notice such slow-motion effect. Was that a deliberate error in order to avoid huge additional costs and probably making the movie less tedious?
Question: When Mark went to get Pathfinder he took about a 30+ days round trip. We didn't see him have to recharge the batteries like his 50 day trip to Aries IV. Why didn't he need the same equipment eg. Oxygenator for the Pathfinder trip?
Question: How is Mark communicating with the crew members through his headset when he is in the MAV? Why didn't they do that to begin with, instead of doing the alphabet thing with earth?
Question: Watney digs up the plutonium and places it in the rover. Why is the rover so cold later after the HAB blows up?
Question: When the HAB blows and he loses his crop of potatoes, how do the other potatoes already harvested survive? They are just sitting in trays in the HAB and surely should have been destroyed by the vacuum.
Factual error: After Watney patches the blow out of one of the HAB's airlocks with plastic sheeting, tie down straps, and duct tape, he pressurizes the HAB and the plastic sheeting pushes out like an inflated balloon. Assuming the plastic and duct tape would hold this is correct, however the plastic would be much more taut given the pressure difference inside and outside. The real mistake is later in the scene during a sand storm the plastic flops in and out. The plastic would remain tautly inflated, since the inside pressure is much greater than outside, and since the HAB is airtight the storm would have no equalizing effect to cause the plastic to be sucked inward.
Trivia: The secret project created to use the Hermes to return to Mars to rescue Watney was called Project Elrond, a reference from the Lord of the Rings (also used in the original book of The Martian). Mitch Henderson, played by Sean Bean, was an attendee at the Project Elrond meeting. Sean Bean also played Boromir, who was an attendee at the Council of Elrond in the LOTR movie.Blathrop
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