An ion is formed when an atom loses or gains electrons. This causes an otherwise neutral atom to acquire a charge:
a positively charged cation is created if electrons are lost.
a negatively charged anion is created if electrons are gained.
The ion rocket is another means of providing thrust, more gradually but also more efficiently than a conventional rocket.
Ion Tail
The well-developed tail structure of was captured in this image taken March 5, 1986. At this point in its orbit, Halley had recently passed on February 9, 1986 and was at its most active.
ion An atom that has lost one or more electrons.
ion tail Thin stream of ionized gas that is pushed away from the head of a comet by the solar wind. It extends directly away from the Sun. Often referred to as a plasma tail.
Ion engines. Xenon - the gas used in plasma television sets, automobile headlights, and photo flash tubes - is used in ion engines.
Ion tail--Even longer than the dust tail, consists of plasma. This is the part of the tail that interacts with the solar wind.
Where do they come from?
ion
an atom that is electrically charged due to the loss or gain of one or more electrons
ionization ...
ION
An electrically charged particle. Ions may be negatively or positively charged.
J ...
ION - Atom with a net electrical charge because it has lost, or gained, one or more electrons relative to the number possessed by a neutral atom of the same element.
Ion channels are pore-forming proteins that help establish and control the small voltage gradient across the plasma membrane of all living cell s by allowing the flow of ions down their electrochemical gradient....
s are integral membrane protein ...
Ion Microprobe: A Secondary Ion Mass Spectrometer (SIMS), a precision instrument used to quantitatively analyze the elements and isotopes of materials at microscopic scales.
Ion -- A charged particle consisting of an atom stripped of one or more of its electrons.
IPAC -- Infrared Processing and Analysis Center at Caltech campus on Wilson Avenue in Pasadena.
ion
A small particle which has a magnetic charge.
ion tail
The straight tail of a comet which is generated by particles from the solar wind.
Ion
an atom that has lost or gained one or more electrons and has become electrically charged as a result.
Ion
(a) A charged particle consisting of an atom, or group of atoms, that has either lost or gained electrons.
Ion - An atom from which one or more electrons has been removed
Ionization - The removal of one or more electrons from an atom ...
ION
An ion is an atom that is missing one or more electrons; ions have an electrical charge.
Ion Tail: A tail of charged gases (ions) always faces away from the sun because the solar wind (ions streaming from the sun at high velocities) pushes it away (it is also called the plasma tail).
Ion engines use electrical charge and work by ejecting positive ions from the back of the rocket.
Ion An atom that carries a positive or negative electric charge as a result of having lost or gained one or more electrons.
More about ions...
Ion Storm
bow shock
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Ion
An atom that, because of the loss of one or more electrons, has a positive electrical charge.
J ...
Ion
An atom with one or more electrons removed (or added), giving the atom a positive (or negative) charge.
Ionization ...
Ion and neutral mass spectrometer: Examines neutral and charged particles near Titan, Saturn, and the icy satellites to learn more about their extended atmospheres and ionospheres.
An ion is an atom or molecule that has a net electrical charge from gaining or losing electrons. The solar wind is made up of ions of different elements such as hydrogen and helium, as well as some heavier elements.
H- ion. [H76]
Negatron
A negatively charged electron, as opposed to a positron. [H76] ...
An ion is a charged species, an atom or a molecule, that has lost or gained one or more electrons.
The ion tail is formed as a result of the photoelectric effect of solar ultra-violet radiation acting on particles in the coma.
The ion engine was scheduled to go into action on September 30, 2003. At first, ...
The ion system will continue to fire until early August, when the spacecraft arrives at a post nearly 1,700 miles from Vesta.
Ion and Neutral Mass Spectrometer (INMS) : The Ion and Neutral Mass Spectrometer (INMS) is a direct sensing instrument that analyzes charged particles (like protons and heavier ions) and neutral particles (like atoms) near Titan and Saturn to ...
gas-ion tail
Lexell's Comet
Eugene Shoemaker, Carolyn Shoemaker, David Levy ...
As the nucleus begins to disintegrate, it also produces a trail of dust or dust tail in its orbital path and a gas or ion tail pointing away from the Sun.
Within each atom or ion, the electrons are not at rest but seem to move in complicated orbits around the nucleus.
[3.1] ELECTROSTATIC ION PROPULSION DRIVES / HALL EFFECT DRIVES
[3.2] HALL EFFECT DRIVES
[3.3] ELECTROTHERMAL & ELECTROMAGNETIC THRUSTERS ...
Many comets have two tails, a gas tail (also called the ion tail) composed of ions blown out of the comet away from the Sun by the solar wind, and a dust tail composed of dust particles liberated from the nucleus as the ices are vaporized.
These include the gas tail (also called the ion tail), which is made up of material that is blown straight back by the solar wind. This is generally made of the really lightweight gases.
A photon can only travel a centimeter or so on average in the core before interacting with and scattering from an electron or positive ion. Each of these interactions changes both the energy and travel direction of the photon.
Bremsstrahlung occurs when an electron passes close to a positive ion, and the strong electric forces cause its trajectory to change.
There proved to be a certain further aptness in the choice of Io's name: Io--"the wanderer" (Greek: ion, "going")--has an indirect influence on the ionosphere of Jupiter as discussed above.
we have in numbers of photons N(Hb) = N(ion) aeff b/ aB. which gives a fixed ratio between line and continuum intensities.
Not only was C/1996 B2 Hyakutake bright but it had an extremely long ion tail as the Ulysses spacecraft found out. The cometary tail was approximately 500 million kilometres long, twice the length of the previous record holder.
A positively charged elementary particle of mass equal to that of a neutron and almost two thousand times that of an electron; a component, with neutrons, of all atomic nuclei : The nucleus of the hydrogen atom : A hydrogen ion, H*, ...
In type I comets, the plasma (or ion) tail is irregular and time-dependent. It is straight and oriented radially away from the due to the solar wind.
Gilbert Castillo researched lithium-ion batteries during his internship at NASA's Ames Research Center in California. Image Credit: Gilbert Castillo
In which NASA student opportunity project did you participate, and how did you get involved in it?
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Vocabulary
angular momentum dust tail ion tail Kuiper Belt long period comet meteor shower nucleus (comet) Oort Cloud primitive short period comet solar wind sublime
Review Questions ...
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Comet Halley's tail, with colors indicating
varying levels of brightness and a type-I,
ion tail visible below a type-II, dust tail
(more on 1910 photo from NOAO).
A number of mechanisms have been proposed to explain coronal heating, The two most commonly proposed mechanisms are wave heating (ion-cyclotron waves) and micro-flare (or nano-flare) heating.
 See also: Earth, Time, Light, Energy, Electron
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