A high-flying satellite reveals a crowd of charged particles in the magnetosphere
Web edition : 1:51 pm
Earth?s magnetic field does more than tell compasses which way to point. Stretching thousands of miles into space, it also buffers our planet from the solar wind, an energetic stream of particles from the sun. Strong bursts of solar wind can change the shape of this protective shield, called the magnetosphere, and particle collisions within the region can cause the beautiful, shifting light shows in the sky known as auroras.
Scientists have known for about a hundred years that the magnetosphere also contains positive-charged particles called cold ions. These particles form in a lower layer of Earth?s upper atmosphere and get swept outward to the magnetosphere. A recent experiment shows that the layer of cold, or low-energy, ions in the magnetosphere is thicker than scientists previously thought.
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Found in: Science News For Kids
Source: http://www.sciencenews.org/view/generic/id/338634/title/FOR_KIDS_Surprise_ions
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