All religions mentioned 7 skies in the universe,are there 7 skies ?

At the babylon era , people devided the sky into seven , and they decided that there is 7 days in a week, they used to celebrate the most shinystars in the sky which they are SUNday, MOONday,SATurnday etc...but that means that all prophits are liers cuz they mentioned 7 skies , but this fact was well common in the old eras !!!it means they didnt spoke to god cuz this information has been developed by humans!!?