context say more than one heaven, Genesis 1:1 "In the beginning God created the heaven and the earth." EARTH and Sky as you states in, in, in, the beginning. now this, Genesis 2:1 "Thus the heavens and the earth were finished, and all the host of them." so we have heaven beyond our sky, (what we call outward space, visible, by naked eye). and there is heaven, (within our space, what we call inner space, invisible, by the naked eye). supportive scripture, Hebrews 11:3 "Through faith we understand that the worlds were framed by the word of God, so that things which are seen were not made of things which do appear." so, there are more than one heaven, so called.
101G.