I assume you mean phobia and not actual xenophobia. I get similar feelings with black holes and any other large space object, really. Mainly in media, though. For example, Elite Dangerous. I was playing that game and discovered a black hole, albeit an extremely small one. For some reason, when I got near it, I felt panicked looking at it. All I felt was a need to get away from this thing as soon as possible. Very strange feeling.