Still on space?
Mini series "From the Earth to the Moon" - it's not a documentary, but it's factually based if you get me.
Dune
Galaxy Quest
First Men in the Moon
Geostorm
Prometheus (horror?)
Stargate (movie, not TV)
The Arrival (1996) (alien, not space)
Valerian and the City of a Thousand Planets
Starship Troopers (horror?)
District 9 (horror?)
Start Trek movies - pick your poison, I like the first in the new series.
There should also be a cheesy early space movie category. Low tech, but fun storyline.
Logans Run
Battlestar Galactica
War of the Worlds (old and new)
Saturn 3