I think that aliens are real but Jesus isn't.
Whenever reading the Bible it's obvious that the writers thought the universe was extremely small and had the Earth at its center. Stars were thought to be tiny and were contained along with the Sun and Moon inside a dome.
If they had truly understood the scope of the Universe then the Genesis creation myth would've taken many more days considering the creation of Earth, the Sun, the Moon, and life in general supposedly took a week. Instead the stars (the rest of the Universe) were created on the same day as the Sun and the Moon.