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Physical Environment > Cosmic Rays |
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This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
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When stars explode they throw out some particles at high speed. These travel through space as cosmic rays. Their speeds are truly phenomenal -- over half the speed of light.
When these particles hit the Earth's atmosphere they are called primary cosmic rays. 85% of these are protons, 12% alpha particles and the rest are electrons heavy nuclei. These collide with the air to create neutrinos. |
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Physical Environment > Cosmic Rays |
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Basic Information |
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