Depends on the situation. Sometimes it's an immediate shock followed up by dread, or sometimes intense anxiety and the desperate need to get away from the image (or thought).
Siderophobia or Astrophobia.
selaphobia
Astrophobia
Astrophobia is the fear of stars or celestial space.
Astrophobia now go on youtube and search xxbigbangxxag!
Fear of space is referred to as astrophobia.
The fear of thunder and lightning is astrophobia; lilapsophobia is the fear of tornadoes and hurricanes.
The fear of planets is known as astrophobia. This can manifest as a fear of celestial bodies or space in general. It is a specific phobia that can cause anxiety or panic in individuals when thinking about or encountering planets.
It sounds stupid, but it's spacephobia. Astrophobia is the fear of celestial space. (sky, heavens, etc)
There is no name for such a phobia. To be afraid of stars could be referred to as astrophobia.
Siderophobia is the fear of the stars. So if you assume that the stars are found in outer space then this fear must also apply to SPACE.
The fear of infinite space is known as "astrophobia." It encompasses a deep anxiety or dread related to the vastness of the universe, the concept of infinity, and the unknown nature of outer space. Individuals may feel overwhelmed by the thought of endless voids, the insignificance of humanity, or the potential dangers that lie beyond Earth. This fear can manifest in various ways, including anxiety about the cosmos, existential concerns, or a fear of the unknown.