When God made the atmosphere He named it heaven.
Is that not what is meant in the fourth commandment? I think it is fair to assume that the immense water canopy was not dissipated so that the sun and moon and stars could be seen until day four. If the earth existed any lenth of time without the sun the watery surface would have been solid ice.
Now it is argued that God can do anything. Perhaps He can do anything except foolish things. Reason says that He made our solar system as a unit. Bible beginnings are not about that.
As far as time is concerned I know some folks think that the 10 C's are universal in the universe. Do we need to believe that heaven and all other inhabited places live on our time and all keep sabbath together? All of the planets in our system have different length days and years. I'm quite willing to wait for the answers but why do we get so worked up trying to insist that Genesis one and two must be understood literally (whatever that means)?
mel