niebie

In a sentence

• Ptaki latają wysoko na niebie.

  The birds fly high in the sky.

  In this sentence, 'niebie' refers to the location where the birds are flying.

• Widzę chmury na niebie.

  I see clouds in the sky.

  Here, 'niebie' is used to describe the place where clouds are observed.

• Gwiazdy świecą jasno na nocnym niebie.

  The stars shine brightly in the night sky.

  In this context, 'niebie' indicates the nighttime sky where the stars are visible.