Toroidal Radius in a solar loop structure, it is the distance from the axis of the loop to the center of the "semi-circle" that the loop forms. Half of the distance from one loop footpoint to the other loop footpoint.
See also Toroidal Radius. Proton A positively charged elementary particle. A proton is 1836 times heavier than an electron. Pulsar A neutron star (burnt-out star) that emits radio waves which pulse on and off.
See also: Solar atmosphere, Radiation belt, Earth, Spectral line, Spectrometer
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