heliosphere


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Related to heliosphere: Oort cloud, Bow shock, Alpha Centauri, Interplanetary Magnetic Field

heliosphere

(hee -lee-ŏ-sfeer) The vast region around the Sun that is permeated by the solar wind and the weak interplanetary magnetic field, and in which the solar-wind plasma plays a dominant role. It is bounded by the heliopause, which is estimated to be 100 AU or more from the Sun's center but has not yet been encountered by any spacecraft. The heliosphere may be very elongated owing to the presence of an interstellar wind of neutral hydrogen flowing from the direction of the galactic center.

heliosphere

[′hē·lē·ə‚sfir]
(astronomy)
The region surrounding the sun where the solar wind dominates the interstellar medium. Also known as solar cavity.
(geophysics)
The region in the ionosphere where helium ions are predominant (sometimes there may be no region in which helium ions dominate).
References in periodicals archive ?
Both data sets now affirm that the local interstellar flow is significantly hotter than believed previously based on the Ulysses observations alone, and provide insight into the direction the heliosphere is moving through the local material in the galaxy, as well as how fast it is traveling.
Scientists had expected the probe to encounter particles under the influence of the interstellar magnetic field that is draped over the outer shell of the heliosphere, inducing an abrupt shift.
SPECTACULAR Carlisle put on a massive fireworks display BALLOON GOES UP This heliosphere was part of the events in Carlisle
Along the way, the ions can once again grab electrons, reform as neutral atoms, and continue to flit back through the heliosphere to be picked up by IBEXAAEs detectors.
A helium heliosphere also floated overhead - operated by a gymnast underneath.
A helium heliosphere also floated overhead, operated by a gymnast underneath.
However, when the solar system passes through very dense gas and dust clouds, the heliosphere can shrink until its edge is inside Earths orbit.
There will be entertainment from 3:15pm which will include music from the leading Queen tribute band, Killer Queen and spectacular entertainment from heliosphere acrobats, plus world championship winning fireworks and the most exciting motor sport action that you are likely to see.
This conjecture about the q-triplet has now empirically confirmed for solar wind in the distant heliosphere (Berlaga and Vinas, 2005) (8).
That's the place where the solar wind--the sun's hot supersonic wind of protons and other charged particles, which carves the heliosphere, a bubble in space extending well beyond the orbit of Pluto--slams into cold interstellar space and abruptly slows.
The saline-filled Bioenterics intragastric balloon (BIB) and the air-filled Heliosphere intragastric balloon are in use in some European and South American countries, Mexico, and Canada, he said.
Internationally renowned company Dream Engine also took to the skies with their heliosphere show.