Labels:text | screenshot | font | number OCR: COSMIC-RAY PARTICLES COSMIC RAYS are highly energetic atomic particles traveling through space at almost the speed of light. Primary cosmic rays are high- energy particles outside the Earth's atmosphere that may enter our atmosphere and collide with other particles to produce secondary cosmic rays. Cosmic rays with the highest energy originate outside our galaxy and come from active galaxies and quasars. Lower-energy cosmic rays come from supernova explosions, supernova remnants, and pulsars inside our galaxy. The lowest-energy cosmic rays originate in the Solar System and come from solar flares.
