| 11. | Cyclic twins are caused by repeated twinning around a rotation axis.
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| 12. | The first two numbers come from the unit vector that specifies a rotation axis.
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| 13. | The rotation axis has a direction but not a position.
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| 14. | In quantum mechanics the free rotation of a molecule is rotation axis of highest order.
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| 15. | For a spinning top, this force tends to be almost parallel to the rotation axis.
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| 16. | According to the Davis-Greenstein mechanism, the grains spin rapidly with their rotation axis along the magnetic field.
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| 17. | Based on the Hubble observations, astronomers calculated a slightly different, and more precise, rotation axis for Vesta.
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| 18. | If both, the rotation and rotoinversion axes satisfy the previous rule, the rotation axis should be chosen.
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| 19. | The broad effect is simply the inclination of the rotation axis to the plane of orbit ."
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| 20. | In three dimensions, the rotation is performed by an angle \ alpha around a random rotation axis.
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