Immagine concettuale di hot plasma ionizzato materia interessata da un campo magnetico

Conceptual image of hot ionised plasma matter affected by a magnetic field Ionised plasma is often referred to as the fourth state of matter It consists of nuclei and electrons The ionised gas in an electric discharge or spark contains positive ions and electrons and a small number of negative ions Plasma is present in many astronomical objects including the sun stars nebulae and other interstella objects Also common forms of plasma lit fluorescent lamps lightning and solar winds, electronics