Galactic Cosmic Radiation
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Galactic Cosmic Radiation

January 9, 2013
This graph depicts the fraction of high energy cosmic rays (greater than 100 MeV) that pass through the boundary of the solar system. 100% of them are present outside of the Bow Shock. There is a small dropoff in the number that make it through to the heliopause. More than 50% are stopped between the heliopause and termination shock, which is at approximately 100 AU. This leaves a fraction less than 25% to permeate to the inner solar system. Credit: Southwest Research Institute

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