Going to look at the stars with 〜に行く
Grammar Explanation: Going to for a purpose with 〜に行く

Jumbo finds Yotsuba and Ena talking about finding Venus in the sky.
- ジャンボ:
- 「星を見
( に行( こう」- “Let's go stargazing.”
- Literal: “Let's go to look at the stars.”
- “Let's go stargazing.”
Key Points
見に行こう means let’s go to see
見
( に marks looking as the purpose of going.行こう is the volitional form, making the line an invitation.
星を見る becomes stargazing in context
The literal wording is “look at the stars”.
The object comes before the purpose phrase
星
( を is the thing they will look at.The structure is object + verb stem + に + movement verb.