The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

Raise the OUTER gate.
Game of Thrones Season 4, Episode 9

My husband actually went
to OUTER space.
The Big Bang Theory Season 6, Episode 9

ripped off from an Outer Limits
script called
The Big Bang Theory Season 7, Episode 18

It's not like I'm an astronaut
floating around in OUTER space.
The Big Bang Theory Season 6, Episode 2

Do you understand we're talking about
dark matter colliding in OUTER space?
The Big Bang Theory Season 3, Episode 4