What are Galactic Cosmic Rays (GCRs) primarily comprised of?

Answer

Atomic nuclei stripped of their electrons.

GCRs are described as being incredibly energetic particles consisting primarily of atomic nuclei, such as protons and heavier ions, that have been stripped of their electrons.

What are Galactic Cosmic Rays (GCRs) primarily comprised of?
Rayradiationcosmicdangerlethality