Yes.
I would like movie star.
Chris Pine and Zachary Quinto star in the new Star Trek movie.
No, the star of the movie, "Sleepy Hollow" is Johnny Depp
They star in the movie Valentines Day
No
No, "North Star" should not be capitalized in this sentence because it is not a proper noun in this context. It is used generically to refer to the star.
I would like to be a movie star.Look! There's another movie star!
Yes, "NBA basketball star" should be capitalized as it is a proper noun and title.
No. Who was the star.....
He was audacious in his pursuit of the movie star.
Yes, constellations should be capitalized.
Yes, it is a proper noun, referring to a constellation and also to a star sign.
She will co-star in a new movie about a mom who home schools her five children.
That movie star has very pulchritudinous features.
The star of the sitcom went on to have a successful movie career
Well, honey, when it comes to grammar, you better capitalize the "T" in "The American Dream" because it's a proper noun. So, show some respect to that dream, capitalize it, and make it stand out like a shining star in the night sky.
The appositive is "a star", which renames the noun phrase "the sun".An appositive should be set off from the rest of the sentence by commas before and after.