ほし
star
hoshi
JMdict 1376310
星(ほし)starがきれいpretty
The stars are pretty
が (subject) points out the subject — 星(ほし) (star) — as the thing being talked about. The sentence ends on the adjective きれい (pretty) with no copula at all; in casual speech you can drop です (is) and let the adjective stand as the whole comment.