Just remember. It isn't all that simple. The Hebrew uses several different words for the word we translate as "heaven." These words show the sky (atmosphere), outer space, and God's Heaven of Heavens, and, distinctions between good and evil, and night and day.

http://www.biblestudytools.com/dictionary/heaven/

http://spectrummagazine.org/article/brian-bull/2012/11/11/genesis-account-six-hebrew-words-make-all-difference

http://biblehub.com/hebrew/8064.htm