What is the fear of the unknown called?
I am wondering what it's called when you fear the unknown, like I am scared of what's hidden deep in the ocean, far out in space, death, etc.--basically things I can't really explain. I just want to know what it's called.
Xenophobia
The irrational sensation of fear experienced about a person or a group of persons as well as situations that are perceived as strange or foreign. It is the fear of anything that is beyond one’s comfort zone.
This article would help explain a lot more on Xenophobia and also explains that this word would fit into your context.