Heaven is where God is by definition.
That would be a good topic for discussion. This was the initial definition of heaven:
"And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so. And God called the firmament Heaven. And the evening and the morning were the second day." (Gen 1:6-8 KJV)
And this is what God placed in the open firmament called heaven:
"And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl that may fly above the earth in the open firmament of heaven." (Gen 1:20 KJV)
It certainly seems like God is trying to tell us that heaven is our atmosphere.
Philip