I have a question about the New Jerusalem and the New Earth. Does the light from New Jerusalem light the New Earth during the Millennium or after. If during, what happens to the New Earth after the millennium, and if after, what is left on the New Earth to light. Since the gates will always be opened, does that mean the saved will be able to travel back and forth between the New Jerusalem and the New Earth?
The New Jerusalem will provide light for Earth during the Millennium (Rev. 21:23-24). The Bible does not give us any detail about the eternity which will follow, so we’ll have to wait and see.
I believe the redeemed and perfected Church will be able to travel between the New Jerusalem and Earth.