7 heavens is one of the more obvious retelling of old astrological based creation myths.
There are 7 heavens in the talmud, and in Hinduism.
People could observe 5 planets, plus the sun and the moon. These 7 objects (which doesnt even include earth) are known as the 'classical planets', and each one was assumed to occupy a 'heaven;.
Seven classical planets has been such a ubiquitous belief that the names of the 7 days of the week originate from it.