geocorona

Etymology
. From being the luminous part of the atmosphere, the outermost region of 's.

Noun

 * 1)  The region of ionized hydrogen (protons) that makes up the outermost region of the Earth's atmosphere (and by extension of other planets.)
 * 2)  Analogs of the geocorona;

Translations

 * French: géocouronne, géocorona, geocorona
 * Spanish: geocorona