Zone of the atmosphere typically situated above 80 kilometers, where each of the constituants has its own scale height since each of them has its own pressure decrease rate.

Large-size granulation (30,000 kilometers).

Very Low Frequency, radio wave whose frequency is between 3 and 30 kilohertz

Streamers of solar matter that can reach an altitude of 10,000 kilometers. The magnetic field in a prominence can be as high as about 50 Gauss (5 x 10-3 T) (see filament).

Field of astronomy concerning the specific study of the intermediate and high planetary atmospheres.

Fraction of the light and energy received that is reflected or diffused by a non-luminous body. The albedo is always comprised between 0 and 1. It varies according to the wavelength. An albedo equal to zero at a given wavelength characterizes a body that absorbs all this radiation perfectly. A value of 1 characterizes a perfect mirror for that wave [..]

Electric current aligned on the magnetic field lines. In the ionosphere, they can be found at high latitudes, in the auroral oval.

A galaxy similar to ours in our local cluster (the Milky Way).

Index of magnetic activity (Planetary Amplitude)

Furthest point from the Sun in the orbit of a body revolving around the Sun.