![]() Įxtending to the rarefied intracluster medium and possibly to intergalactic regions, plasma can be artificially generated by heating a neutral gas or subjecting it to a strong electromagnetic field. It is the most abundant form of ordinary matter in the universe, being mostly associated with stars, including the Sun. Plasma (from Ancient Greek πλάσμα ( plásma) 'moldable substance') is one of four fundamental states of matter, characterized by the presence of a significant portion of charged particles in any combination of ions or electrons. Bottom right: A plasma trail from the Space Shuttle Atlantis during re-entry into Earth's atmosphere, as seen from the International Space Station. ![]() Bottom left: A plasma globe, illustrating some of the more complex plasma phenomena, including filamentation. Top: Lightning and neon lights are commonplace generators of plasma.
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