Physics Question #317

Shagufta, a 12 year old female from the Internet asks on January 10, 1998,

What are cosmic rays?

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The answer

Barry Shell answered on January 10, 1998

Cosmic rays are high energy particles that bombard the earth from outer space. They are primarily made of protons, alpha particles and the nuclei of atoms like carbon, nitrogen, oxygen and other heavier atoms. Their energy varies considerably and their origin is unknown.

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