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An asymmetric region surrounding a planet, star, or other body, in which the body's magnetic field traps charged particles and dominates their behavior.

mag·ne′to·spher′ic (-sfîr′ĭk, -sfĕr′-) adj.


(Physical Geography) the region surrounding a planet, such as the earth, in which the behaviour of charged particles is controlled by the planet's magnetic field
magnetospheric adj


(mægˈni təˌsfɪər)

1. the outer region of the earth's ionosphere where the earth's magnetic field controls the motion of charged particles, as in the Van Allen belts.
2. such a region of another planet.
mag•ne`to•spher′ic (-ˈsfɛr ɪk) adj.


The region near the planet possessing a magnetic field, which determines the motion of the charged particles in this region. Earth, Saturn, Jupiter, Uranus, and Mercury are the solar system planets known to have magnetospheres.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.magnetosphere - the magnetic field of a planetmagnetosphere - the magnetic field of a planet; the volume around the planet in which charged particles are subject more to the planet's magnetic field than to the solar magnetic field
magnetic field, magnetic flux, flux - the lines of force surrounding a permanent magnet or a moving charged particle


[mægˈniːtəʊˌsfɪəʳ] Nmagnetosfera f
References in periodicals archive ?
In this study, published in the Journal of Geophysical Research, scientists compared ground-based videos of pulsating auroras--a certain type of aurora that appears as patches of brightness regularly flickering on and off--with satellite measurements of the numbers and energies of electrons raining down towards the surface from inside Earth's magnetic bubble, the magnetosphere.
These sources alternate between radio and X-ray pulsar regimes as a result of the interaction between the in-flowing plasma and the outward pressure exerted by their magnetosphere and radiation.
The encounter was unique within Cassini's mission, as it was the only time the spacecraft has observed Titan in a pristine state, outside the region of space dominated by Saturn's magnetic field, called its magnetosphere.
Task orders issued under the PAAC III Bridge contract provide critical support to a wide range of NASA's missions and projects including the James Webb Space Telescope; Magnetosphere Multi-scale Mission; Joint Polar Satellite System; Geostationary Operational Environmental Satellites; Tracking and Data Relay Satellite; Ice, Cloud and Land Elevation Satellite II/Advanced Topographic Laser Altimeter System; Exobiology on Mars/Mars Organic Molecule Analyzer; Origins Spectral Interpretation Resource Identification Security Regolith Explorer Visible and Infrared Spectrometer; Neutron Star Interior Composition ExploreR; and Deep Space Climate Observatory.
Over the coming months, scientists will analyse the data to unravel the magnetic contributions from other sources, namely the mantle, crust, oceans, ionosphere and magnetosphere.
The interaction of solar wind with the magnetosphere, producing auroras and other phenomena, and magnetohydrodynamic generation are covered next.
The main threat comes when a solar flare disrupts the earth's magnetosphere.
The spacecraft will measure Jupiter's polar magnetosphere and explore the solar system's most powerful auroras - the planet's northern and southern lights - by flying directly through them.
Tel: 029 2039 7933 After Hours At The Polestar Club Chapter Arts Centre, Cardiff, 8pm Tickets: PS8-PS12 The strange tale of a girl in space, life in the magnetosphere and the attraction of northbound travel.
Figure 3 shows the impact of this cloud on the Earth's magnetosphere, with an interpretation of the possible sequence of events.
Analysis of data beamed back by one of the 11 payloads carried by the lunar orbiter, SARA ( Sub- keV Atom Reflecting Analyser), shows the presence of a mini- magnetosphere on the lunar surface.
To be sure, the sun is experiencing a very quiet period, lessening the solar magnetosphere.