NASA (yes, that NASA) and the Houston Cinema Arts Society have teamed up to organize a contest that is pretty out of this world. The short film competition, CineSpace, offers filmmakers around the world a chance to share their works inspired by—and created with—actual NASA imagery. That gives you quite a bit to work with— 50 years’ worth of universe exploration, to be precise.
Not that you’ll even need that much footage; submissions are only required to feature at least 10% of NASA video imagery. The imagery may be obtained through the NASA Image Archives or other publicly available means, such as YouTube.