I came across a video https://www.youtube.com/watch?v=ixuq23pklsx4i that says that Seven Heavens is the Seven Celestial bodies of Classical Antiquity i.e. Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn.

The video says that verse 71:15 talks about Seven Heavens and then 71:16 says that Sun and Moon are among them. Then it tells about the story of Abraham (A.S.) 6:75, was shown kingdom of Heavens and the Earth. He saw a planet 6:76, Moon 6:77 and Sun 6:78.

Furthermore, this video says that the words ‘Ardhi Mislahuna’ actually mean that ‘Earth is like Planets’. Not that Earth has Seven Layers or Seven Earths. This is a very interesting video with many scientifically accurate accounts of Quran. Please let me know if these view are correct?