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heliosphere |
Also found in: Wikipedia, Hutchinson | 0.04 sec. |
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heliosphere [′hē·lē·ə‚sfir] (astronomy) The region surrounding the sun where the solar wind dominates the interstellar medium. Also known as solar cavity. (geophysics) The region in the ionosphere where helium ions are predominant (sometimes there may be no region in which helium ions dominate). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Researchers had previously inferred the presence of a hydrogen wall around the sun. |
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