The Bible speaks of 3 different heavens <<< >>>(plural).
Genesis 1:1 says that God created "the heavens" (plural). .
The 1st heaven is the atmosphere around the earth. Where birds & planes fly.
The 2nd heaven is moon, stars, galaxies etc.
The 3rd heaven is spiritual and exists outside of our observable universe.
2 Cor 2:2 I knew a man in Christ above fourteen years ago, (whether in the body, I cannot tell; or whether out of the body, I cannot tell: God knoweth
such an one caught up to """the third heaven""".
Deut 10:14 Behold, the heaven and the heaven of heavens is the LORD'S thy God, the earth also, with all that therein is.
1 Kings 8:27 But will God indeed dwell on the earth? behold, the heaven and heaven of heavens cannot contain thee; how much less this house that I have builded?
Final thought:
Christ went to sit at the right hand of the Father. Ehp 4:10 states Christ ascended up far above all heavens (plural). So the Throne (dwelling place) of God is beyound the 3rd Heaven
Eph 4:10 He (Christ) that descended is the same also that ascended up far above all heavens, that he might fill all things.
Eph 1:
20 Which he wrought in Christ, when he raised him from the dead, and set him at his own right hand in the heavenly places,
21 Far above all principality, and power, and might, and dominion, and every name that is named, not only in this world, but also in that which is to come: