In reply to Bellie:
Prometheus is the worst of the 5 Alien movies. Films 1 - 4 are much better. Some people aren't so keen on 3 though a friend of mine says it was his favourite.
The Martian is definitely good imo.
There are also the five Terminator films if you've not seen them. No. 2 is the best but all are pretty good.
The Matrix trilogy?
If you liked Moon then Source Code by the same director, Duncan Jones, is very good: proper sci fi in that explores weird possibilities of what future technology might lead to.
Ex Machina, AI, and Transcendence are different views on AI.
Limitless is a sci-fi/thriller about smart drugs of the future.
Looper and Predestination are pretty decent thrillers involving time travel.
Minority Report is a really interesting film about using physics to see crimes before they happen. Sound a bit naff like that but really good film.
Oblivion is set in the future when Earth's resources have been completely destroyed. Another interesting unpredictable story.
In Time, set in a future where people can stop aging.
District 9 is about a harmless Alien Space ship marooned in Johannesburg and also about racism.
Edge of Tomorrow is a mind bender featuring the use of time travel.
There are the Planet of the Apes films. Rise of the Planet of the Apes is probably my favourite but most are good in different ways.
Mission to Mars I thought was good despite the low reviews.