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Van Allen belt |
Also found in: Acronyms, Wikipedia, Hutchinson | 0.07 sec. |
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Van Allen belt either of two regions of charged particles above the earth, the inner one extending from 2400 to 5600 kilometres above the earth and the outer one from 13 000 to 19 000 kilometres. The charged particles result from cosmic rays and are trapped by the earth's magnetic field 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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While the first Pioneer blew up shortly after its 1958 launch and the next three didn't meet their main goal of photographing the surface of the moon, they did provide valuable information about the Van Allen radiation belts. The solar gas takes 50 to 70 hours to reach the Earth, where it interacts with the Van Allen radiation belt, a perpetual cloud of high-energy particles that surrounds the equator like a doughnut. Similar bands, the Van Allen radiation belts, surround Earth. |
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