<P> Plasmas can appear in nature in various forms and locations, which can be usefully broadly summarised in the following Table: </P> <Table> Common forms of plasma <Tr> <Th> Artificially produced </Th> <Th> Terrestrial plasmas </Th> <Th> Space and astrophysical plasmas </Th> </Tr> <Tr> <Td> <Ul> <Li> Those found in plasma displays, including TV screens . </Li> <Li> Inside fluorescent lamps (low energy lighting), neon signs </Li> <Li> Rocket exhaust and ion thrusters </Li> <Li> The area in front of a spacecraft's heat shield during re-entry into the atmosphere </Li> <Li> Inside a corona discharge ozone generator </Li> <Li> Fusion energy research </Li> <Li> The electric arc in an arc lamp, an arc welder or plasma torch </Li> <Li> Plasma ball (sometimes called a plasma sphere or plasma globe) </Li> <Li> Arcs produced by Tesla coils (resonant air core transformer or disruptor coil that produces arcs similar to lightning, but with alternating current rather than static electricity) </Li> <Li> Plasmas used in semiconductor device fabrication including reactive - ion etching, sputtering, surface cleaning and plasma - enhanced chemical vapor deposition </Li> <Li> Laser - produced plasmas (LPP), found when high power lasers interact with materials . </Li> <Li> Inductively coupled plasmas (ICP), formed typically in argon gas for optical emission spectroscopy or mass spectrometry </Li> <Li> Magnetically induced plasmas (MIP), typically produced using microwaves as a resonant coupling method </Li> <Li> Static electric sparks </Li> <Li> Capacitively coupled plasmas (CCP) </Li> <Li> Dielectric Barrier Discharges (DBD) </Li> </Ul> </Td> <Td> <Ul> <Li> Lightning </Li> <Li> The magnetosphere contains plasma in the Earth's surrounding space environment </Li> <Li> The ionosphere </Li> <Li> The plasmasphere </Li> <Li> The polar aurorae </Li> <Li> The polar wind, a plasma fountain </Li> <Li> Upper - atmospheric lightning (e.g. Blue jets, Blue starters, Gigantic jets, ELVES) </Li> <Li> Sprites </Li> <Li> St. Elmo's fire </Li> </Ul> </Td> <Td> <Ul> <Li> Stars (plasmas heated by nuclear fusion) </Li> <Li> The solar wind </Li> <Li> The interplanetary medium (space between planets) </Li> <Li> The interstellar medium (space between star systems) </Li> <Li> The Intergalactic medium (space between galaxies) </Li> <Li> The Io - Jupiter flux tube </Li> <Li> Accretion discs </Li> <Li> Interstellar nebulae </Li> </Ul> </Td> </Tr> </Table> <Tr> <Th> Artificially produced </Th> <Th> Terrestrial plasmas </Th> <Th> Space and astrophysical plasmas </Th> </Tr> <Tr> <Td> <Ul> <Li> Those found in plasma displays, including TV screens . </Li> <Li> Inside fluorescent lamps (low energy lighting), neon signs </Li> <Li> Rocket exhaust and ion thrusters </Li> <Li> The area in front of a spacecraft's heat shield during re-entry into the atmosphere </Li> <Li> Inside a corona discharge ozone generator </Li> <Li> Fusion energy research </Li> <Li> The electric arc in an arc lamp, an arc welder or plasma torch </Li> <Li> Plasma ball (sometimes called a plasma sphere or plasma globe) </Li> <Li> Arcs produced by Tesla coils (resonant air core transformer or disruptor coil that produces arcs similar to lightning, but with alternating current rather than static electricity) </Li> <Li> Plasmas used in semiconductor device fabrication including reactive - ion etching, sputtering, surface cleaning and plasma - enhanced chemical vapor deposition </Li> <Li> Laser - produced plasmas (LPP), found when high power lasers interact with materials . </Li> <Li> Inductively coupled plasmas (ICP), formed typically in argon gas for optical emission spectroscopy or mass spectrometry </Li> <Li> Magnetically induced plasmas (MIP), typically produced using microwaves as a resonant coupling method </Li> <Li> Static electric sparks </Li> <Li> Capacitively coupled plasmas (CCP) </Li> <Li> Dielectric Barrier Discharges (DBD) </Li> </Ul> </Td> <Td> <Ul> <Li> Lightning </Li> <Li> The magnetosphere contains plasma in the Earth's surrounding space environment </Li> <Li> The ionosphere </Li> <Li> The plasmasphere </Li> <Li> The polar aurorae </Li> <Li> The polar wind, a plasma fountain </Li> <Li> Upper - atmospheric lightning (e.g. Blue jets, Blue starters, Gigantic jets, ELVES) </Li> <Li> Sprites </Li> <Li> St. Elmo's fire </Li> </Ul> </Td> <Td> <Ul> <Li> Stars (plasmas heated by nuclear fusion) </Li> <Li> The solar wind </Li> <Li> The interplanetary medium (space between planets) </Li> <Li> The interstellar medium (space between star systems) </Li> <Li> The Intergalactic medium (space between galaxies) </Li> <Li> The Io - Jupiter flux tube </Li> <Li> Accretion discs </Li> <Li> Interstellar nebulae </Li> </Ul> </Td> </Tr>

Where can the fourth state of matter be found