There is no specific explanation for how hard the conflicting settings are, and it is not difficult for anyone with a bit of hard science fiction to see it. Here's an explanation of a few other questions raised by others who questioned the "hardness" of the film.
First, how did the captain of No. 1 get into No. 2.
The crew of No. 2 on No. 1 kept sending back video and sound reports while exploring the state of the spacecraft. As the two people who stayed behind No. 1, of course, they had to analyze and process them in time or just sit there together. Look, and give informational and emotional support to teammates on 1. Is it normal to stare at the connection channel between the two ships at this time? Judging from the observation that player No. 2 entered No. 1, is it reasonable to assume that the original member of No. 1 survived and entered No. 2 without knowing it?
The AI about the spaceship didn't react in time to this, and it's not a big problem. The No. 2 spacecraft itself is a clone of No. 1, and naturally retains the identification data of No. 1's crew. Finding No. 1 and logging in to investigate was not part of the original plan, so no corresponding procedures were set in advance. When the No. 2 departed, except for the different sailing orbits (due to the different launch times, the relative positions of the earth, the sun and the planets along the way have changed), it is only necessary to add the data of the new crew. When Captain 1 entered, of course the AI recognized him: a crew member! own people! Why call the police? It has no way of knowing what Captain 1 is thinking. Maybe it gave Captain No. 1 a warm welcome and necessary help!
Second, how 1 was destroyed.
Under the unique circumstances (stress, loneliness, death threats) the captain becomes insane and destroys the main computer. In desperation, the crew chose to commit suicide collectively.
Third, the plot after falling into the sun.
That's right, the heat on the sun's surface can melt everything, so the flames were slowly engulfing the cabin. However, because the missile cabin is close to the core of the sun and is in the huge gravitational field of the sun, space and time may be greatly distorted in this environment, and the laws of physics that we are familiar with will largely fail, so the movie is interpreted like this. Also pretty close to scientific fact (i.e. no one knows what will happen until you get there in person unscathed, but a time-space disorder is quite possible).
Fourth, the color of the spacesuit.
This spacesuit is obviously specially designed for recent work. The most important requirements for the spacesuit for this task are to reflect as much sunlight as possible and to withstand high temperatures. So the outermost layer of the spacesuit may be a thick layer of gold alloy. It is unreasonable for some to accuse the director of being absurd by associating its color with the sun.
I think the movie is very conservative from a hard sci-fi point of view. But the picture and details are almost impeccable.
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