How? We don't know gods exist. We know beings with technology and agency living on planets in space exist. There seems nothing at all similar between the two explanations.
Planet. Man has reach the moon (not in my lifetime) but that isn't a planet. There are robots out a little farther but so far as we can be sure only one planet has life. (you can calculate odds of others but there isn't enough data to be confident)
In the ancient view of the cosmos, God/gods, the heavens and other divine beings were part of the same universe. They were literally above the Earth, but made of a different kind of substance. Or down in the depths.
At some point more this shifted to the divine being an entirely separate supernatural domain.
https://en.wikipedia.org/wiki/Calculating_God?useskin=vector