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.

"Astro" means "STAR."
The Big Bang Theory Season 3, Episode 4

1975 Mego Star Trektransporter,
The Big Bang Theory Season 12, Episode 24

A dazzling STAR...
Westworld Season 2, Episode 9

Star Trek V has specific failures
in writing and direction...
The Big Bang Theory Season 2, Episode 8

Well, now don't be surprised if
like Star Trek, it's canceled in three.
The Big Bang Theory Season 10, Episode 4