Yes, there’s an astronomy movie — Palindrome:
Palindrome is the official motion picture event for New Zealand’s contribution to the worldwide 2009 International Year of Astronomy.
It’s a psychological drama about a guy trying to fulfil his childhood dream of being an astronomer. I’d have quoted the full synopsis, but the Promo page above has all its text in images (sigh).
View a trailer and / or a promo on YouTube. Both are linked from the promo page above.
I’m not so much into psychological drama myself, but may watch this if it ever drifts across my vision. I found one part of the promo particularly amusing: where the actor talked about how much fun it all was, while the scene behind him showed the character he plays thumping the walls of a lift in torment. Hmmm.