PEDAUNT

4th Dec 2015

The Martian (2015)

Factual error: Towards the end of the film Watney is told to discard the heavy nose cone of the Martian Ascent Vehicle and replace it with a flimsy plastic sheet because the atmosphere is so thin that it will not be damaged despite the vehicle being accelerated to Martian escape velocity - nearly 14,000 kmh. But the storm caused massive damage earlier. It cannot work both ways - if the atmosphere is so thin that it won't dislodge a jury rigged plastic canopy from an accelerating spacecraft, it cannot possibly whip up a storm like the one we see.

PEDAUNT

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Suggested correction: Mars' atmosphere works very differently than Earth's. Near the surface, there are often heavy storms and winds. But go up near the edge of the atmosphere, it's drastically thinner. Earth's atmosphere doesn't differ THAT much; your logic would make sense for Earth. However, for Mars' atmosphere, the movie was accurate.

Absolute rubbish. It is a well established fact that the atmospheric pressure on Mars is 610 pascals, 1% of that on Earth. A 170 kmh wind storm on Mars (specified in the film) would be like a gentle, 18kmh breeze on earth. There is absolutely no way that a storm like the one we see at the beginning of the film could occur on Mars. The storm would barely scatter small pebbles about, let alone throw a spacesuited human body around. As for the atmosphere on Earth not differing form that on Mars... good grief, are you serious? Anyway, don't take my word for it. "No, it's not accurate!" Goddard cheerfully informed us (The Radio Times). "It's the one big buy of the movie, that because of the atmosphere, or lack thereof, Mars would never have a storm that big. But if we didn't do it, we wouldn't have a movie. It sort of kicks off the movie." You think Mr Goddard would be in a good position to comment. He wrote the screenplay.

You need to take the thickness of Mars' atmosphere into consideration.

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