18 
This video by Keith Melton is monumental: every space helmet in every movie ever, put together for our collective space nerdgasm. It’s a pleasure to watch them all, even more so because of the amazing soundtrack: a perfect David Bowie’s Space Oddity and The Beatles’ Eleanor Rigby mashup. [Keith Melton via Geektyrant via Pewpewpew]
Well, it didn’t include:
Star Trek (2009)
Escape from the Planet of the Apes
Planet 51
Apollo 18
There must be so many more.
Total Recall
Outland (1981)
Outlander
Prometheus
Superman (2006)
Ummmm.
Ok, ok, it has Outland.
Star Wars
Star Trek VIII: First Contact?
You beat me to it.