Fig. 3.7. Pictorial representation of the plasmasphere, magnetosphere, and principal electric current systems. The sun is off the page to the lower left. (This picture was contributed by Dr. David Cauffman, NASA Headquarters, Washington, D.C.) In addition to potential influences on organisms (considered in Sec. 2), the additional night light, especially if it is diffuse, may interfere with ground-based optical astromony (considered in Sec. 4). If the reflected light were not diffuse but concentrated in a relatively narrow beam, it could be damaging to the naked eye.
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