Christians have written fiction in all sorts of genres (e.g., childrens literature, Romance, historical fiction, fantasy literature). But not much crime fiction (Crime and Punishment does not count), not many thrillers, and even less science fiction.
So why the lack of Christian sf? We do have some. C.S. Lewis wrote a kind of sf trilogy but it was not your typical sf (deliberately so) and I am not sure how much it counts. Stephen Lawhead wrote two Empyrion books and Dream Thief which are proper sf. We have a postmillennial trilogy by [gone blank on name] but not much else.
The best known religious sf writer is the Mormon Orson Scott Card but Mormonism is like an sf religion of its own so is perhaps more conducive to that kind of thing.
Why if sf a mostly Christian-free-zone?
1. Is it because Christian beliefs about the return of Christ make imagining far futures which do not feature Jesus suspect? (Of course, you can do near-future sf like La Haye and Jenkins' Left Behind series.)
2. Is it because imagining alternative worlds to the one that God chose to actualize is considered ... suspect? Playing God?
3. Is it a problem with imagining intelligent life on other planets? Would this dethrone humanity from the place that God has given it?
Is good science fiction written from a Christian worldview possible? (I hope so because I do love good sf)