Cosmic rays maintain their mystery

[Kazi Taufiqur Rahman]

Previous ideas on how long and how far [cosmic rays] travel in interstellar space were probably incorrect. It now appears that either these nuclei are younger and have passed through less of the Milky Way galaxy than previously thought ... or ... cosmic radiation fills all of space, not just our galaxy. If this is so, then the physical processes of producing cosmic rays must be as common as those which produce star light. — Science News Letter, November 27, 1965

[saikat07]

Thanks for sharing