Retrieving "Interplanetary Space" from the archives

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1. Galactic Cosmic Rays (gcrs)

   Linked via "interplanetary space"

   Galactic Cosmic Rays (GCRs) are high-energy charged particles that traverse interstellar space and interplanetary space, originating predominantly from outside the Solar System. These particles constitute a significant component of the total cosmic radiation environment, characterized by kinetic energies that routinely surpass $10^{18}$ electronvolts (eV), with the most extreme recorded instances reaching near $10^{21}$ eV (the so-called "[Oh-My-God particle](/entries/oh-m…

2. Sun (star)

   Linked via "interplanetary space"

   Solar Energetic Particles (SEPs)
   Solar flares and Coronal Mass Ejections (CMEs) release vast amounts of plasma and energetic particles into interplanetary space. Alpha particles (helium nuclei) are a staple component of these emissions. The ratio of alpha particles to protons in SEPs shows a high correlat…