If I’m not mistaken, the Bible says that satan is the prince of this world. So let’s imagine for a second that it’s the year 3013, and humans have colonized other planets and other galaxies, with elaborate cities just like here on Earth (assuming Jesus Christ has not returned by this point in time). Does that mean that there will be no evil on those colonies?
My logic in this is that, if satan is the prince of this world, then he can cause evil to happen on this world. The Bible says nothing about him being the prince of other worlds, so to me, that seems like he would have no affect on the people living on these other worlds.