This article presents an interesting thought exercise. How would Paganism adapt to a human migration to other planets?
Personally, I had always wondered how you would read Earth in a natal chart for a colonist born on Mars or the Moon. But a whole other star system? Astrology would not fare well.
Otherwise, I don’t see the problem. There would be spirits relating to natural forces on other planets, and we would have to get to know them (and them us). The existential question is whether our gods are attached to Earth, and if we could take them with us or they would have to stay behind. Depending on the nature of the gods, they might already be on other planets. Either way, from a practical level it shouldn’t matter, and we’d just need to cultivate relationships with the gods present wherever we moved to.
But given that an effort to colonize other planets would involve generational spacecraft (it did in Firefly, too), what would happen to paganism during the crossing? What gods could come with us for several hundred years in a tin can surrounded by void?