It is true that space debris can indeed cause uncontrolled collisions between objects present in lower earth orbit (LEO); the orbit that encloses every orbit below 2000 km, Kessler syndrome, excess of “trash” in the space orbit could cause problems. The world communication can be blacked out.
It is also true that space station can fall out of orbit. ISS has to be boosted to make sure that it maintains the orbit. The process doesn’t take place suddenly. It takes a few years, it is true that the earth’s atmosphere is relative to Earth’s size. In the film, the fantastic shots of earth enveloped a thin translucent layer of atmosphere which was truly mesmerising. The best thing is that they have correctly depicted the atmosphere’s thinness relative to the earth’s size without exaggeration.
