You searched for: “geocorona
geocorona (s) (noun), geocoronas (pl)
1. The outermost region of the earth's atmosphere, reaching to a height approximately 15 times the radius of the earth and consisting mainly of hydrogen.
2. An envelope of ionized gases, mainly hydrogen, which encircles the earth to about 15 earth radii and emits Lyman-alpha radiation in the presence of sunlight which refers to a radiation emitted by hydrogen associated with the spectral line in the Lyman series (group of lines in the ultraviolet spectrum of hydrogen) whose wavelength is 121.5 nanometers.
This entry is located in the following units: coron-, coroll- (page 2) geo-, ge- + (page 6)