1.
night sky
The sky as seen at night.
夜空を見上げた。
I looked up at the night sky.
夜空 is a compound of 夜 (night) + 空 (sky).
COMMON COLLOCATIONS:
- 夜空に輝く: to shine in the night sky
- 夜空を見上げる: to look up at the night sky
- 満天の星空: sky full of stars
RELATED VOCABULARY:
- 青空: blue sky
- 星空: starry sky
- 大空: wide sky, firmament