Ionization

alt=The solar wind moving through the magnetosphere alters the movements of charged particles in the Earth's thermosphere or exosphere, and the resulting ionization of these particles causes them to emit light of varying colour, thus forming auroras near the polar regions.|thumb|201x201px|The solar wind moving through the [[magnetosphere alters the movements of charged particles in the Earth's thermosphere or exosphere, and the resulting ionization of these particles causes them to emit light of varying color, thus forming auroras near the polar regions.]] Ionization or ionisation is the proce

autoprotolysis or exchange of a proton between two water molecules

thumb|300px|Photoionization is the process that makes once-invisible filaments in deep space glow.

gas ionisation process where free electrons are accelerated by an electric field, collide with gas molecules, and consequently free additional electrons

process in atomic physics

process in which atoms are released from a hot surface, and in the process are ionized