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The roughly spherical volume of space, centered on the sun and extending into the Kuiper belt, that is composed of particles emitted from the sun and forms a bubble that displaces the interstellar medium.


(Astronomy) the region around the sun outside of which the sun's influence is negligible and interstellar space begins


(ˈhi li əˌsfɪər)

the region around the sun over which the effect of the solar wind extends.


The area of space occupied by the Sun’s magnetic field and gases.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.heliosphere - the region inside the heliopause containing the sun and solar system
region, part - the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space"
Milky Way, Milky Way Galaxy, Milky Way System - the galaxy containing the solar system; consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky
solar system - the sun with the celestial bodies that revolve around it in its gravitational field
References in periodicals archive ?
STFC RAL Space will lead the development of instruments to observe the sun and heliosphere and UCL Mullard Space Science Laboratory will lead the development of instruments to make measurements of the solar wind.
The flow and acceleration profile is merely a reflection of the hot plasma responding to pressure gradients from the outer bounds of the heliosphere.
The team combined the data from NASA's heliophysics missions and the geochemistry data from the LANL-GEO spacecraft to study the heliosphere.
Top stand-ups Adam Buxton, David O'Doherty and Henning Wehn will also appear and there will also be a return for the Heliosphere, the aerial acrobatic act that caused such a stir in the festival's first year.
The prevalent picture of the heliosphere was one of comet-shaped structure, with a rounded head and an extended tail.
Voyager 1, at more than twice the distance of Pluto, finally left the solar system's heliosphere of solar wind and entered true interstellar space.
2012 - Our Voyager 2 probe enters the "heliosheath"— the outermost layer of the heliosphere.
Now, a new study uses IBEX data and simulations of the interstellar boundary -- which lies at the very edge of the giant magnetic bubble surrounding our solar system called the heliosphere -- to better describe space in our galactic neighborhood.
They include discussion of heliosphere boundary measurements, interstellar grain alignments, molecular gas, stars, star formation, planetary physics, exoplanetary systems, high-velocity stars, metal-poor stars, galactic archaeology, semianalytic vs.
1 [degrees]C, but reduced solar activity also lowers the strength of the heliosphere magnetic shield permitting more cosmic rays to reach the earth and seed more clouds that then reflect more sunlight.
It will continue on past one or more Kuiper Belt objects, and onward to explore the outer heliosphere.
An event organiser said there will be free entertainment including: "The amazing Heliosphere Acrobat, Titan the Robot, marching bands, falconry displays, dancing horses, maypole dancing, and a host of tribute acts.