"The bird floats in the sky."

Translation: 새가 하늘에 떠요.

[HelloMichaelh]

No hint for the word "float".

[MalvikaPat3]

Shouldn't it be "하늘에서", as there is an action happening in the sky?

[oee16]

Float, 뜨다 used here to mean in the state of suspension, is considered a stative verb. Hence, it is followed by 에, in/on.

Similar stative verbs are 있다 (stay/be), stand (서다), sit (앉다), lie down (눕다) ...

On the other hand,
Float, 표류하다 used to mean drift gently is a dynamic verb. In such case, 에서 will be used to mean in/on.