| 41. | At the time, the precession of the equinoxes had not been discovered.
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| 42. | Precession was in the vertical fore-aft plane.
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| 43. | Gyroscopic precession causes the disc to rotate toward horizontal through its flight path.
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| 44. | The Tamil calendar has stayed in synch with the precession of the equinoxes.
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| 45. | The effect was consequently named " Thomas precession ".
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| 46. | This difference is caused by phase lag, often confused with gyroscopic precession.
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| 47. | This is related to the phenomenon of Thomas precession.
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| 48. | Phase lag is a separate phenomenon from gyroscopic precession.
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| 49. | For more information, see precession of the equinoxes.
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| 50. | It is completely unrelated to torque-free and torque-induced precession.
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