The heavens in plural in the Quran means
The gaseous heavens or the gaseous layers of the upper atmosphere above the region of the clould, and this is mentioned after the earth because it was formed after the formation of the earth, and the gases emerged from the earth itself
- The ethereal heavens
These are the ethereal layers formed in the ancient times and had been issued from the broken up planets
and so they are mentioned before mentioning
the earth
The material heavens
They are the planets including the earth and are generally mentioned in the Quran in the form
The heavens and the earth