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Ion tail

Astronomy  Ion storm  Ionization

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.


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 tail
The relatively straight tail of a comet produced by the solar wind acting on ions.
iron meteorite
A meteorite composed primarily of iron.


The straight tail of a comet which is generated by particles from the solar wind.

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).

- up to 100 million km long, it is composed of ions that interact with the solar wind.

Ion Tail
plasma laced with rays and streamers up to 100 million km long
caused by interactions with the solar wind
Hydrogen Cloud ...

The is formed as a result of the photoelectric effect of solar ultra-violet radiation acting on particles in the coma.

gas-ion tail
Lexell's Comet
Eugene Shoemaker, Carolyn Shoemaker, David Levy ...

The '' is made of glowing electrically charged particles pushed away by the steady wind of charged particles from the Sun. This tail remains straight and often glows blue or blue-green.

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.

dust tail: up to 10 million km long composed of smoke-sized dust particles driven off the nucleus by escaping gases; this is the most prominent part of a comet to the unaided eye;
: as much as several hundred million km long composed ...

ion tail (comet): one of the two tails of a comet made of ionized particles that points directly away from the Sun from the action of the solar wind. It has a bluish color from the emission lines mostly of ionized carbon monoxide.

(of a comet) Filamentary tail of a comet (separate from the dust tail), resulting from the interaction of the solar wind with ions in the comet's head. irregular galaxy galaxy without symmetrical form.

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 ), which is made up of material that is blown straight back by the solar wind. This is generally made of the really lightweight gases.

The solar wind of high-speed protons and electrons sweeps cometary ions in a direction away from the Sun, producing a straight plasma or ion tail. A second tail consisting of dust particles about a micrometer in size may appear.

The solar wind and the are both so rarefied that collisions between their particles hardly ever occur.

Every comet then really has two tails, a dust tail and an ion tail. If the comet is faint, only one or neither tail may be detectable, and the comet may appear just as a fuzzy blob of light, even in a big telescope.

hydrogen envelope - Hydrogen gas that surrounds the coma of the comet and trails along for millions of miles (it is usually between the and the dust tail).

This forms a bluish colored ion tail. The dust particles are pushed away from the comet by solar radiation, forming a dust tail that can be many millions of miles long.

Well:- the comet DID survive perihelion, amd sprouted a faint in the process. the LASCO images posted just a few hours ago by NASA are truely stunning!!
! ...

At the same time, the ion tail, made of gases, always points directly away from the Sun, as this gas is more strongly affected by the solar wind than is dust, following magnetic field lines rather than an orbital trajectory.

The or plasma tail is formed when photons from the Sun ionise the gas in the coma. These ions follow the magnetic fields carried by the solar wind and so this tail usually appears pointing directly away from the Sun.

Ion tails develop because of the pressure of sunlight, which drives very small particles out of the head of comets, while dust tails are due to the pressure of the solar wind; in general an ion tail is straight, while a dust tail is curved.

The of comet Hale-Bopp, which is comprised largely of charged particles as opposed to the heavier dust particles making up the dust tail, could possibly show complex structure or discontinuities, ...

The ion tail is much less massive, and is accelerated so greatly that it appears as a nearly straight line extending away from the comet opposite the Sun. Thus, comets should have two distinct tails.

Thus, relatively massive dust tails are accelerated slowly and tend to be curved. The is much less massive, and is accelerated so greatly that it appears as a nearly straight line extending away from the comet opposite the Sun.

The ions - electrically charged particles - interact with the sun's solar wind, causing a comet magnetotail that points away from the sun. The ions travel along the magnetic field lines, so the ion tail points away from the sun.

See also: See also: Dust, Solar, Comet, Sun, Nucleus

Astronomy  Ion storm  Ionization

 
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