Check out Kubrick's "A Space Odyssey," very cool. And Star Trek. You can also navigate this list, there are many good films about space) http://goo.gl/z5BBRt
You will laugh, but "Cosmos". He is "Cosmos".
In fact, under this name there are two series, one from the early eighties, with Carl Sagan, the second, his 2014 reboot, with Neil Tyson. Both are good in their own way, I recommend both.
There is also a book of the same name by Carl Sagan, I also recommend it. It is like an appendix / addition to the series.