outer space vs sky in Korean
우주vs하늘

우주outer space
Outer space (우주) is the huge area beyond Earth where the sun, moon, stars, and planets are. We use this word when talking about space, astronauts, rockets, or the night sky. It is a common word in science class and in everyday conversations about stars and planets.
When to use outer space
하늘sky
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.
When to use skyHow they differ
outer space (우주) and sky (하늘) are nearby Korean vocabulary items learners often meet together. Use “outer space” when Outer space (우주) is the huge area beyond Earth where the sun, moon, stars, and planets are. We use this word when talking about space, as… Use “sky” when 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…