A similar process is thought to take place on the Sun. Galactic cosmic rays collide with nuclei in the solar atmosphere, in the gigaelectronvolt range.
gamma-ray space telescope, and found that the GeV emission was brighter and more copious than expected during the Sun's calm periods. What we don't know is how the emission gets so bright. It doesn't match theoretical models. Given how lousy the Sun is with messy magnetic fields, it's probable they play a role. Indeed, a
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