In the GJ 436 system, which hosts a Neptune sized planet, galactic cosmic rays are dominated by stellar cosmic rays, because the planet lies relatively close in to the star (0.2 AU). The stellar cosmic rays lead to high ionization in the atmosphere.
In the GJ 436 system, which hosts a Neptune sized planet, galactic cosmic rays are dominated by stellar cosmic rays, because the planet lies relatively close in to the star (0.2 AU). The stellar cosmic rays lead to high ionization in the atmosphere.
@zleap possibly! For Earth-like northern light, GJ 436 b would need a magnetic field, and we don't know if it has one. If not, something vaguely like aurora can still happen if a magnetic field is induced from currents in the planetary atmosphere.