Also found in: Thesaurus, Encyclopedia, Wikipedia.


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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Astronomy) the region around the sun outside of which the sun's influence is negligible and interstellar space begins
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈhi li əˌsfɪər)

the region around the sun over which the effect of the solar wind extends.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


The area of space occupied by the Sun’s magnetic field and gases.
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The Dream Engine's Heliosphere saw a seemingly weightless acrobat suspended beneath a helium balloon spiralling and spinning, while Mind the Gap's Mirror Mirror saw two robotic creatures exploring Brum.
HELIOSPHERE AND CLOUDSCAPES Bullring and Grand Central, July 13 and 14 Bullring and Grand Central is turning intergalactic to celebrate 50 years since the moon landings.
These satellites, which will be about as big as suitcases, will be the main feature of the mission dubbed as Polarimeter to Unifry the Corona and Heliosphere (PUNCH).
"It is refreshing to work for an organisation that genuinely believes that celebrating our differences will make it a better company for all" says Tamara Holmgren, projects & modifications manager, Eastern Heliosphere. "BP recently refreshed the flexible working guidelines which has the power to positively impact the difficulties of juggling a work- life balance, something which is a major reason cited for loosing mid-career female engineers.
"Now we are fortunate enough to have two very brave sentinels that have left our heliosphere and are out truly looking at the other side of the boundary in our interstellar medium," Fox said.
Data from instruments aboard the spacecraft showed it crossed the outer edge of the heliosphere, a protective bubble of particles and magnetic fields produced by the sun, on Nov.
The twin probes have left the heliosphere, but have not yet left the solar system, "and won't be leaving anytime soon," NASA said in a statement.
NASA's Voyager 2 probe has now exited the heliosphere, which is a protective bubble of particles and magnetic fields created by the Sun, and is slightly farther than 18 billion kilometers (which is 11 billion miles, or more than 118 times the distance from the Earth to the Sun) from Earth.
The spacecraft is beyond the outer boundary of the heliosphere, 11 billion miles from Earth.
The Interstellar Mapping and Acceleration Probe, or IMAP mission, which is planned to launch in 2024, is aimed at helping researchers better understand the boundary of the heliosphere, a bubble surrounding and protecting the solar system whose protection from radiation affects life on Earth.