Sodium is at least 13 times less abundant around Ganymede than around Europa, possibly because of a relative deficiency at the surface or because the magnetosphere fends off energetic particles.
Natrium setidaknya 13 kali kurang melimpah di sekitar Ganymede daripada di sekitar Europa, mungkin karena kekurangan relatif di permukaannya atau karena magnetosfernya memerangkap partikel berenergi.