Questions & Answers about Chúng ta ngắm sao ở hồ.
Chúng ta means we, including the listener. It is the inclusive we.
- chúng ta = we (you and I / you all and I)
- chúng tôi = we (not including the listener)
So if the speaker is talking to someone who is part of the star-watching group, chúng ta is the right choice.
Ngắm means more than just briefly looking. It often means to gaze at, admire, look at carefully, enjoy looking at.
So ngắm sao gives the idea of watching the stars or stargazing, not just noticing them for a second.
Compare:
- nhìn = look / see
- ngắm = gaze at, admire, look at with attention
Both are possible, but sao is very common and natural here.
- sao = star
- ngôi sao = star (full noun form, often a bit more explicit)
In everyday speech, especially in a phrase like ngắm sao, Vietnamese often uses just sao. It sounds natural and idiomatic.