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Precession refers to a specific change in the direction of the rotation axis of a rotating object, in which the second Euler angle (angle of nutation) is constant Precession may specifically mean: *Precession is the name of one of the Euler rotations *Axial precession (astronomy) — the precession of the Earth's axis of rotation (also known as the "precession of the equinoxes"), or similar *de Sitter precession — a general relativistic correction to the precession of a gyroscope near a large mass such as the Earth *Larmor precession — the precession of the magnetic moments of electrons, atomic nuclei, and atoms about an external magnetic field *Lense-Thirring precession — a general relativistic correction to the precession of a gyroscope near a large rotating mass such as the Earth *Precession (mechanical) — the process of one part rotating with respect to another due to fretting between the two *Thomas precession — a special relativistic correction to the precession of a gyroscope in a rotating non-inertial frame Precession can also refer to change in the direction of an axis other than an axis of rotation: *Apsidal precession, perihelion precession, or orbital precession, the rotation of the orbit of a celestial body == See also == *Axial tilt, also called axial inclination or obliquity, is the inclination angle of a planet's rotational axis in relation to a perpendicular to its orbital plane *Conventional International Origin is a conventionally defined reference axis of the pole's average location over the year 1900 *Great year, also known as a Platonic year or Equinoctial cycle, is the time required for one complete cycle of the precession of the equinoxes *Nutation is a slight irregular motion (etymologically a "nodding") in the axis of rotation of a largely axially symmetric object *Polar motion is the movement of Earth's rotation axis across its surface 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Precession (disambiguation)」の詳細全文を読む スポンサード リンク
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