Cosmic rays are actually high-energy particles, such as protons, that come from sources outside of our solar system. They are believed to come from sources such as supernovae, black holes, and active galactic nuclei. They can have energies millions of times greater than the particles produced in Earth-based particle accelerators.

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Cosmic Rays Are

Question 61

Multiple Choice

Cosmic rays are:

A) photons with even higher energy than gamma rays
B) high-velocity particles produced in novae
C) elementary particles with very high energies
D) synchrotron emission from strong magnetic fields
E) dark-matter particles falling into the galaxy

Correct Answer: