This is the 12016th most frequent Turkish word.
gökyüzünün
"Of the sky" or "of the heavens."
Here, 'gökyüzünün' is used as a possessive construction meaning 'of the sky,' indicating the attribute related to the sky, specifically its blueness.
Gökyüzünün maviliği, insanı huzura kavuşturur.
The blueness of the sky brings peace to one.
In this sentence, 'gökyüzünün' specifies whose stars are shining, those in the sky, establishing possession.
Gökyüzünün yıldızları geceleyin parıldar.
The stars of the sky shine at night.
The usage of 'gökyüzünün' here introduces the origin or source of the 'beauties,' attributing them to the sky.