| 21. | Such frequency modulation can occur, for instance, due to a pulsar's orbital motion in a compact binary.
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| 22. | In these cases, the magnetization arises from the electrons'orbital motions, which can be understood classically as follows:
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| 23. | Their orbital motion is very, very eccentric,
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| 24. | The A component is held stationary and the relative orbital motion of the B component is shown.
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| 25. | The reverse is true at " b ", where the perturbation retards the orbital motion of Uranus.
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| 26. | The true orbit is the shape of the orbit viewed perpendicular to the plane of the orbital motion.
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| 27. | Since both effects are caused by the effect of orbital motion on alignment, they are very closely related.
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| 28. | Binary stars provide the only direct way to measure the mass of stars, from observations of their orbital motions.
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| 29. | This creates a cloudy water column which travels under tidal influence as the wave orbital motion is in equilibrium.
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| 30. | He guessed the same force was responsible for other orbital motions, and hence named it " universal gravitation ".
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