Sunshine is a 2007 movie directed by Danny Boyle.
The plot:
In the future, the sun is dying out and all humans are going to die. A spaceship carrying a "bomb" is sent to the sun in hopes of creating a new sun within the sun. The ship is not heard from and the mission is unsuccessful. A new ship, Icarus 2, is sent on the same mission. The entire movie takes place on Icarus 2 (well, for the most part

).
I found it to be a good sci-fi flick. It wasn't great, but definitely worth a view. Of course, it has the usual Hollywood dumb-down of physics and the requisite drama, but it was not overdone imo (except for the last 15 minutes or so).
At the link above, there is a section called "Goofs" under "Fun Stuff". I'd be interested to hear people's comments on these points (the last one is a bit of a spoiler, so I suggest that one for those that have seen it).