To the person who said "its a movie, not the history channel," the history channel is horribly inaccurate. Just thought I'd let you know.
Anyway, I was disappointed because I know Danny Boyle could have done much better. I never expect science fiction films to get the science right (these days I hardly think of them as science fiction) but what bothers me is that this was marketed as a plausible science fiction movie, when it is absolutely not on so many different points.
To start with, all the uranium and plutonium on earth couldn't create a bomb large enough to reignite the sun. Even if it could, they would have to detonate it at the core for it to have any real affect, which is not what they did.
The ship would have burnt up not far past Mercury. As with the hydrogen bomb, we simply can't make a heat shield powerful enough to withstand the sun at such close proximity with any materials found on Earth, or our surrounding planets. I doubt anything could, but I'm no science expert, just a science fiction fan.
Also, the "Q-ball" postulated to be the reason behind the sun's sudden death is a subatomic particle. Accepting that these "balls" exist, the sun doesn't possess the density to be affected by one.
There are so many other things this movie got wrong, but its really not a bad movie in my opinion. Unlike other modern science fiction movies, at least it has science and some of it is accurate and presented in a fashion that is easy to follow and entertaining. It is better known for its spiritual and psychological themes that do well to drive the plot. If Alex Garland had written the script in conjunction with a science fiction writer (refer to Stanley Kubrick and Arthur C. Clarke's collaboration on "2001: A Space Odyssey") they could have cleared up some of the more glaring scientific inaccuracies and made something really special out of this. As it is, it comes off as an amateur approach to epic science fiction, a specific genre that should only be approach by veterans of the field.

Out Of The Strong Came Forth Not The Botanist.
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