mag|ne|to|sphere

mag|ne|to|sphere
mag|ne|to|sphere «mag NEE tuh sfihr, -NEHT uh-», noun.
1. a zone of strong magnetic forces that surrounds the earth and extends outward about 40,000 miles, trapping within the earth's magnetic field electrons, protons, and other particles radiating from outer space. The Van Allen radiation belts are part of the magnetosphere. »

The moon, unlike the earth, is not protected from the solar wind—it has no magnetic field and, therefore, no shielding magnetosphere (Science News).

2. any similar zone around a heavenly body: »

If the pulsars are magnetic neutron stars spinning in a vacuum…such a star must have a magnetosphere, a plasma-filled region surrounding the star (Jeremiah P. Ostriker).


Useful english dictionary. 2012.

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Look at other dictionaries:

  • sphere — aero·sphere; as·theno·sphere; as·tro·sphere; bar·y·sphere; bathy·sphere; bathy·ther·mo·sphere; bio·sphere; blas·to·sphere; cen·tro·sphere; chon·drio·sphere; chro·mo·sphere; coc·co·sphere; cos·mo·sphere; demi·sphere; ec·to·sphere; en·sphere;… …   English syllables

  • mag — aero·mag·net·ic; an·ti·fer·ro·mag·net; an·ti·fer·ro·mag·net·ic; an·ti·fer·ro·mag·net·ism; an·ti·mag·ma·tist; an·ti·mag·net·ic; cag·mag; he·mag·glut·i·nate; he·mag·glu·ti·na·tion; he·mag·glu·ti·nin; hy·po·mag·ne·se·mia; mag·a·dis; mag·a·dize;… …   English syllables

  • magnetosphere — mag·ne·to·sphere …   English syllables

  • magnetosphere — mag•ne•to•sphere [[t]mægˈni təˌsfɪər[/t]] n. 1) astron. 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) astron. such a region of another planet •… …   From formal English to slang

  • ne — ne·ma·li·on; ne·ma·li·o·na·ce·ae; ne·ma·li·o·na·les; ne·mat·ic; ne·mat·o·gen; ne·mat·o·gone; ne·me·an; ne·mer·tea; ne·me·sia; ne·mi·ne; ne·mi·ne; ne·mo; ne·mo·bi·us; ne·moc·era; ne·moph·i·la; ne·mori·cole; ne·mou·ri·dae; ne·ne; ne·ne; ne·o·blast; …   English syllables

  • magnetosphere — mag*net o*sphere, n. 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. [WordNet 1.6] …   The Collaborative International Dictionary of English

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