Astrophysics (index)

Plasma

(state of matter where atoms are not part of molecules and are ionized)

Plasma is a state of matter in addition to solid, liquid, and gas. Plasma is gas-like but the atoms are generally free of molecular bonds and ionized. As a whole, a body of plasma is neutral, but it includes positive and negative particles, e.g., positive ions and electrons. The "line" distinguishing plasma from gas (i.e., "how much of the material needs to be ionized?") has no universally-used precise definition, but the general idea is that a gas is considered plasma if it shows the distinct qualities of plasma, which include electrical conductivity and the generation of a magnetic field.

The plasma state is generally maintained by high Temperature. Much (perhaps most) of the matter in the universe is in the plasma state. Stars such as the Sun are sufficiently hot as to ionize much of their matter and the Intergalactic Medium (IGM) through Galaxy Clusters (CL) is generally highly ionized.

Plasma is used in technology such as neon signs and plasma displays.


(physics)
http://en.wikipedia.org/wiki/Plasma_(physics)

Referenced by:
Active Galactic Nucleus (AGN)
Alfvén Wave
Baryon Acoustic Oscillations (BAO)
Beta (β)
Cassini
Chemodynamics
Chondrite
Coronal Mass Ejection (CME)
Compton Scattering
Corona
Current Sheet
Europa Clipper
Filament
Gadget-2
Galactic Halo
Galaxy Cluster (CL)
Gas Flow
Hall Effect
Intracluster Medium (ICM)
Intergalactic Medium (IGM)
Interplanetary Medium (IPM)
Jet
Juno
Magnetosonic Wave
Mars Express
Magnetohydrodynamics (MHD)
Phase Transition
Photosphere
Plasma Frequency
Quantum Tunneling
Rosseland Mean Opacity
Radiative Transfer Code (RT Code)
Equation of Radiative Transfer (RTE)
Scintillometry
Shock Wave
Source Function (S)
Standard Model of a Flare
Stellar Atmosphere
Stellar Model Atmosphere
STEREO
Surface Temperature
Sunyaev-Zel'dovich Effect (SZ Effect)
21cm Experiment
Transmission Spectroscopy
Vortex
Voyager

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