Very nice. The first 45 seconds reminded me a lot of the scoring from ‘Alien’. :D
Some odd choices, for example at the end it jumps from orchestral to light rock, and I think you missed some of the animation ques like the lights firing up (2 frames before the animation starts is the best place to drop the sound) but all in all very impressive :) I also found it melodically a bit light considering the subject matter but thats being nit-picky.