While the relevance of lightning as a source of fixed nitrogen has been largely studied, the contribution of coronae discharges still remains unelucidated.
It is not held by them iure coronae.
They are also related to fissure craters, coronae, dense clusters of volcanic domes, cones, wells and channels.
Other structural features are observed in coronae and coronae-like features as well as tesserae and other highly tectonized units.
The angular size of the corona depends on the diameters of the cloud droplets - small droplets produce large coronae.
It seems that only some giants, and very few supergiants, possess coronae.
They are usually associated with coronae and "tesserae".
Coronae differ from haloes in that the latter are formed by refraction (rather than diffraction) from comparatively large rather than small ice crystals.
