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Figure 16. A log-log plot of magnetic moments M (in gauss cm³)
of astronomical objects, as labeled, vs. their angular momenta Iω.
Definitive values are shown as solid circles for Mercury, Earth, Mars,
Jupiter, Saturn, Uranus, and Neptune. The straight line is the least squares
fit to these seven points. Upper limit values of M are shown for the Moon
and Venus. The rectangular box includes the best available values for
pulsars and the open circle gives a nominal value of M for the Sun
corresponding to an equatorial "surface" field of 1.0 gauss.
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