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EP-95 ON THE MOON WITH APOLLO 16

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FIGURE 76.-Observed magnetic field of the Earth. The solar wind "blows" the magnetic lines toward the back side of the Earth forming the magnetosheath and the geomagnetic cavity. The geomagnetic cavity extends to at least 100 earth radii. The Earth and Moon are not sketched to scale. The Moon completes an orbit about the Earth every 28 days. NASA PHOTO S-72-16321.

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