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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.
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 ?
NASA's Solar and Heliospheric Observatory (SOHO) was able to capture the moment when a comet collided with the Sun.
The selected proposals are: Spatial/Spectral Imaging of Heliospheric Lyman Alpha (SIHLA)
The summer camp involved lectures and other activities that covered various topics related to space weather, including cosmic ray particle transport theory, plasma physics, solar physics, heliospheric physics, computer simulations for modelling and understanding local space weather, and the impact of space weather on Earth's atmosphere, satellites, and space.
The Lunar Environment heliospheric X-ray Imager, however, will capture images of the solar wind.
Author of more than 200 articles in refereed journals in solar and heliospheric phenomena, Dr Zurbuchen has also been involved with several Nasa science missions involving planet Mercury, the Sun and other heavenly objects.
A recent discovery made by the scientists at ESA/NASA's Solar and Heliospheric Observatory (SOHO) is making all of us do a double take.
The ESA/NASA Solar and Heliospheric Observatory (SOHO) delivers real-time views of the Sun.
Scientists analyzed data collected from 2010-2016 by the Heliospheric and Magnetic Imager (HMI) instrument on board NASA's Solar Dynamics Observatory.
Where the coronal fields are open (i.e., one end of the field line connects directly back to the solar surface while the other end is connected to the heliospheric fields), the solar wind particles can stream out into interplanetary space.
The team dug through more than 16 years of data from the joint ESA/NASA Solar and Heliospheric Observatory (SOHO) spacecraft, launched in 1995 in part to look for g modes reverberating through the Sun.
These are intercut with a psychedelic scene of sunspots moving over a blazing orange ground--data from nasa's Solar and Heliospheric Observatory; the skyline of Mexico City buried in smog; and the sun reflecting off the mirrored heliostats at Fuentes de Andalucla's Gemasolar Thermosolar Plant.
The model indicates that the heliospheric tail doesn't extend to large distances but is split into two jets, with a form similar to astrophysical jets observed in many other stars and around black holes.