When to use sky in Korean
Korean: 하늘[ ha-neul ]

When to use it
Sky means the space above us, where we can see the sun, clouds, moon, and stars. In Korean, 하늘 is used when talking about weather, colors, and things you see outside. It is a very common everyday word, like saying the sky is blue or cloudy.
Example sentences
오늘 하늘이 정말 파래요.
The sky is really blue today.
구름이 하늘에 많아요.
There are many clouds in the sky.
학교 운동장에서 하늘을 봐요.
I look at the sky in the school yard.
비행기가 하늘을 날아요.
An airplane flies in the sky.
엄마, 하늘에 별이 많아요.
Mom, there are many stars in the sky.
여행 중에 하늘 사진을 찍었어요.
I took a photo of the sky during the trip.