Fun facts, all major scriptures from Abrahamic religions (Jews, Christians and Islam) mentioned about multiple layers of heavens/skies where seven (7) is the top most layer. It also mentioned in the Quran [41:12] that the galaxies/stars/planets, are all residing in the lowest heaven/sky[1].

[1]https://quran.com/41/12?translations=21,20,19,17,101,22,95,1...