This is what I answered, works pretty well as a starting post for this thread as well

Star Trek, 2009
Star Trek Into Darkness, 2013
Stargate, District 9 and Iron Sky might not be that much of a space movies, but come close enough in my opinion. I think Iron Sky is the weakest of the movies listed here.
Stargate, 1994
Galaxy Quest, 1999
District 9, 2009
Gravity, 2013
Iron Sky, 2012
Galaxy Quest and Iron Sky are comedies, the rest are more "serious" movies.
There is also a series from Stargate, and spinoffs too like Stargate: Atlantis, 2004–2009
I'm sure there are more good space movies, these are just some I could think of now. And for some reason I have this feeling that I am forgetting something obvious from the list.. Maybe someone else can tell us what it was

And right before posting two came into my mind, Aliens, 1986 and Event Horizon, 1997
Edit: The original question was after some Star Wars talk so I'll link them here too:
Star Wars, 1997
Star Wars: Episode V - The Empire Strikes Back, 1980
Star Wars: Episode VI - Return of the Jedi, 1983
Star Wars: Episode I - The Phantom Menace, 1999
Star Wars: Episode II - Attack of the Clones, 2002
Star Wars: Episode III - Revenge of the Sith, 2005