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Periodic change in the direction of a rotation axis
Precession is a change in the orientation of the rotational axis of a rotating body. In an appropriate reference frame it can be defined as a change in
Precession
Change of rotational axis in an astronomical body
In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In the absence
Axial_precession
Movement of an object's magnetic moment axis about a magnetic field
In physics, Larmor precession (named after Joseph Larmor) is the precession of the magnetic moment of an object about an external magnetic field. The phenomenon
Larmor_precession
Changes in the moon's rotation and orbit
Lunar precession is a term used for three different precession motions related to the Moon. First, it can refer to change in orientation of the lunar rotational
Lunar_precession
Topics referred to by the same term
angle (angle of nutation) is constant Precession may refer to: Precession, one of the Euler rotations Precession (mechanical), the process of one part
Precession_(disambiguation)
Topics referred to by the same term
corrections to the Newtonian precession, of a gyroscope near a large mass such as the earth. They are: Thomas precession a special relativistic correction
Relativistic_Precession
Topics referred to by the same term
In celestial mechanics, orbital precession may refer to: Apsidal precession, where the major axis of an elliptical orbit cycles its orientation within
Orbital_precession
Global climate cycles
Croll's earlier hypothesis that variations in eccentricity, axial tilt, and precession combined to result in cyclical variations in the intra-annual and latitudinal
Milankovitch_cycles
Area of the sky divided into twelve signs
2nd century BC, as well as into developing the Hindu zodiac. Due to the precession of the equinoxes, the time of year that the Sun is in a given constellation
Zodiac
Rotation of a celestial body's orbital line of apsides
In celestial mechanics, apsidal precession (or apsidal advance) is the precession (gradual rotation) of the line connecting the apsides (line of apsides)
Apsidal_precession
Rotation of a satellite as it orbits
Nodal precession is the precession of the orbital plane (more specifically, the line of nodes) of a satellite around the rotational axis of an astronomical
Nodal_precession
Precession of satellite orbits due to a celestial body's presence affecting spacetime
The geodetic effect (also known as geodetic precession, de Sitter precession or de Sitter effect) is a consequence of the curvature of spacetime, predicted
Geodetic_effect
Precession of a gyroscope due to a nearby celestial body's rotation affecting spacetime
In general relativity, Lense–Thirring precession or the Lense–Thirring effect (Austrian German: [ˈlɛnsɛ ˈtɪrɪŋ]; named after Josef Lense and Hans Thirring)
Lense–Thirring_precession
Astrology term
product of the Earth's slow precessional rotation and lasts for 2,160 years, on average (one 25,920 year period of precession, or great year, divided by
Age_of_Aquarius
Relativistic correction
In physics, the Thomas precession, named after Llewellyn Thomas, is a relativistic correction that applies to the spin of an elementary particle or the
Thomas_precession
Device to demonstrate Earth's rotation
due to Earth's rotation. The precession rate of the pendulum's oscillation plane depends on latitude. The angular precession rate Ω p {\displaystyle \Omega
Foucault_pendulum
Mechanical displacement of an axis
Precession is the process of a round part in a round hole, rotating with respect to each other, wherein the inner part begins rolling around the circumference
Precession_(mechanical)
Neural mechanism
Phase precession is a neurophysiological process in which the time of firing of action potentials by individual neurons occurs progressively earlier in
Phase_precession
Wobble of the axis of rotation
such that the first Euler angle (or precession) is constant. Astronomers usually make a distinction between precession, which is a steady long-term change
Nutation
Visible star that is nearly aligned with Earth's axis of rotation
Kochab. The precession of the equinoxes takes about 25,770 years to complete a cycle. Polaris' mean position (taking account of precession and proper motion)
Pole_star
Device for measuring or maintaining orientation
used to demonstrate the principle. A simple case of precession, also known as steady precession, can be described by the following relation to a moment[which
Gyroscope
Variance in a celestial body's axis of rotation over time
different timescales, astronomers usually make a distinction between precession, which is a steady long-term change in the axis of rotation, and nutation
Astronomical_nutation
Time period in ancient historical and astrological theories of time
the axial precession of the Earth and commonly referred to as precession of the equinoxes; secondly, that, due to the nature of the precession of the equinoxes
Astrological_age
German-born theoretical physicist (1879–1955)
a gravitational lens but also to another astronomical phenomenon, the precession of the perihelion of Mercury (a slow drift in the point in Mercury's elliptical
Albert_Einstein
Averaging technique for electron diffraction
Precession electron diffraction (PED) is a specialized method to collect electron diffraction patterns in a transmission electron microscope (TEM). By
Precession electron diffraction
Precession_electron_diffraction
Cyclic climate pattern
parameters include the precession of the equinoxes, obliquity, and eccentricity as put forth by the Milankovitch theory. The precession of the equinoxes is
North_African_climate_cycles
"anomalous" precession of the perihelion of Mercury, the bending of light in gravitational fields, and the gravitational redshift. The precession of Mercury
Tests_of_general_relativity
Effect of general relativity
implement a dedicated mission aimed to measure the Lense–Thirring node precession of a pair of counter-orbiting spacecraft to be placed in terrestrial polar
Frame-dragging
Direction on Earth's surface
tracing a tiny circle in the sky each sidereal day. Due to the axial precession of Earth, true north rotates in an arc with respect to the stars that
True_north
Time taken by the Earth to orbit the Sun once with respect to the fixed stars
the ecliptic longitude of the Sun to increase 360 degrees", due to the precession of the equinoxes. The sidereal year is 20 minutes 24.7 seconds longer
Sidereal_year
Type of MRI sequence
methods of manipulating contrast at this stage, namely steady-state free-precession (SSFP) that does not spoil the remaining transverse magnetisation, but
Gradient_echo
Apparent path of the Sun on the celestial sphere
to unmoving against the background stars, its motion due to planetary precession being roughly 1/100 that of the celestial equator. Spherical coordinates
Ecliptic
Phase of a cycle
geodesic segments, the precession will all come from the angles where the segments of the geodesics meet; the total precession is equal to the net deficit
Geometric_phase
Unit of time based on Earth's orbit
two, for several reasons explained below. Because of the Earth's axial precession, this year is about 20 minutes shorter than the sidereal year. The mean
Year
Two interrelated physics theories by Albert Einstein
Gravitational time dilation: Clocks run slower in deeper gravitational wells. Precession: Orbits precess in a way unexpected in Newton's theory of gravity. (This
Theory_of_relativity
Hypothetical oscillation in the precession of the equinoxes
medieval theories of astronomy, refers to hypothetical oscillation in the precession of the equinoxes. The theory was popular from the 9th to the 16th centuries
Trepidation
Astronomical location
course of a few decades, will list different ephemerides. This is due to precession and nutation, both of which can be modeled, as well as other minor perturbing
Equinox (celestial coordinates)
Equinox_(celestial_coordinates)
Greek astronomer, geographer and mathematician (c. 190 – c. 120 BCE)
trigonometry, but is most famous for his incidental discovery of the precession of the equinoxes. Hipparchus was born in Nicaea, Bithynia, and probably
Hipparchus
Timekeeping system on Earth relative to the celestial sphere
complete rotation. This phenomenon is termed the precession of the equinoxes. Because of this precession, the stars appear to move around Earth in a manner
Sidereal_time
Global climate phenomenon
the most influence on teleconnection in annual, millennial and semi-precessional timescales. Pleistocene 240 Kya / Indian and Pacific oceans / Coccolithophore
El_Niño–Southern_Oscillation
Moment in time used as a reference point in astronomy
in motion, e.g. by the precession of the equinoxes, nowadays often resolved into precessional components, separate precessions of the equator and of the
Epoch_(astronomy)
Indian calendar system
computations in which the phenomenon of precession of equinoxes is not taken into consideration. In Indian astronomy, the precession of equinoxes is called ayana-calana
Nirayana_system
Point on the celestial sphere
being the first point of Libra, located exactly 180° from it. Due to precession of the equinoxes since the positions were originally named in antiquity
First_point_of_Aries
Theory of gravitation as curved spacetime
Einstein's equations). Relativistic precession has been observed for all planets that allow for accurate precession measurements (Mercury, Venus, and Earth)
General_relativity
Instrument which measures very small variations in the Earth's magnetic field
A proton magnetometer, also known as a proton precession magnetometer (PPM), uses the principle of Earth's field nuclear magnetic resonance (EFNMR) to
Proton_magnetometer
Angle between the rotational axis and orbital axis of a body
relative to a stationary orbital plane throughout the cycles of axial precession. But the ecliptic (i.e., Earth's orbit) moves due to planetary perturbations
Axial_tilt
System for the precession of equinoxes
Sanskrit term for many systems used in Hindu astrology to account for the precession of equinoxes.[verification needed] There are also systems of ayanamsa
Ayanāṃśa
Ratio of magnetic moment to angular momentum
the sign of γ determines the sense (clockwise vs. counterclockwise) of precession. Within atoms and molecules some shielding occurs, with the effect that
Gyromagnetic_ratio
Amount by which an orbit deviates from a perfect circle
not the axis of rotation, which is referred to as axial precession. Both types of precession, along with changes in eccentricity and axial tilt, form
Orbital_eccentricity
Star at the centre of the Solar System
to explain the perihelion precession of Mercury but Einstein proposed that general relativity could explain the precession using a spherical Sun. When
Sun
the apsidal precessions of the planets accurately, it would have to be discarded as a theory of gravitation. Such an anomalous precession was observed
Two-body problem in general relativity
Two-body_problem_in_general_relativity
Spectroscopic technique to probe the magnetization of ferromagnetic materials
(Larmor precession) of the material and lost as heat. For this coupling to occur, the frequency of the incident wave must be equal to the precession frequency
Ferromagnetic_resonance
Forms of astrology
every 72 years from the perspective of the Earth due to the Earth's axial precession, tropical systems consider 0 degrees of Aries as always coinciding with
Sidereal and tropical astrology
Sidereal_and_tropical_astrology
Description of the dynamics of magnetization in a solid
used for a differential equation describing the dynamics (typically the precessional motion) of magnetization M in a solid. It is a modified version by Gilbert
Landau–Lifshitz–Gilbert equation
Landau–Lifshitz–Gilbert_equation
Theorem in classical mechanics
his theorem to understanding the overall rotation of orbits (apsidal precession, Figure 3) that is observed for the Moon and planets. The term "radial
Newton's theorem of revolving orbits
Newton's_theorem_of_revolving_orbits
Movement of an object which leaves at least one point unchanged
around an axis fixed in the body that moves. These rotations are called precession, nutation, and intrinsic rotation. A system which behaves the same regardless
Rotation
Period of time for the ecliptic longitude of the Sun to increase 360°
20 minutes and 24.7 seconds longer than the tropical year due to the precession of the equinoxes. Since antiquity, astronomers have progressively refined
Tropical_year
American physicist, writer, and Nobel Laureate (born 1940)
Hartle, Thorne derived from general relativity the laws of motion and precession of black holes and other relativistic bodies, including the influence
Kip_Thorne
Moon stops moving north or south
about 18.134° (north or south) and 28.725° (north or south), due to lunar precession. These extremes are called the minor and major lunar standstills. The
Lunar_standstill
Type of geocentric orbit
celestial sphere to keep pace with the Earth's movement around the Sun. This precession is achieved by tuning the inclination to the altitude of the orbit (see
Sun-synchronous_orbit
Length of time
constellations takes roughly 25,920 years. In the heliocentric model, this precession can be visualized as the Earth’s rotational axis slowly tracing a circular
Great_Year
Astronomical coordinate analogous to latitude
completing one circuit in about 26,000 years. This effect, known as precession, causes the coordinates of stationary celestial objects to change continuously
Declination
1981 book by Jean Baudrillard
meaningless by being infinitely mutable; he called this phenomenon the "precession of simulacra". Simulacra and Simulation delineates the sign-order into
Simulacra_and_Simulation
Discrepancy between past temperatures and the amount of incoming solar radiation
contribution to variation in insolation is much smaller than those of precession and obliquity. The 100,000-year problem refers to the lack of an obvious
100,000-year_problem
The Moon's circuit around Earth
apsidal precession is distinct from the nodal precession of its orbital plane and axial precession of the moon itself. Exaggerated apsidal precession of the
Orbit_of_the_Moon
Compact astronomical body
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Black_hole
Twelfth astrological sign of the zodiac
position is now mostly covered by the constellation of Aquarius due to the precession from when the constellation and the sign coincided. Today, the First Point
Pisces_(astrology)
Projection of Earth's equator out into space
constellations the celestial equator passes through will change due to axial precession. Celestial bodies other than the Earth also have similarly defined celestial
Celestial_equator
Error in numerical data
False precision (also called overprecision, fake precision, misplaced precision, excess precision, and spurious precision) occurs when numerical data are
False_precision
Hypothetical elementary particle
external electric field, a precession in the nuclear spin rotation occurs. This precession can be measured using precession magnetometry and if detected
Axion
Concept that simultaneity depends on choice of reference frame
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Relativity_of_simultaneity
Magnetic resonance imaging sequence
Steady-state free precession (SSFP) imaging is a magnetic resonance imaging (MRI) sequence which uses steady states of magnetizations. In general, SSFP
Steady-state free precession imaging
Steady-state_free_precession_imaging
Simple quantum mechanical system
lead to the precession about the axis defined by the applied magnetic field (this is the quantum mechanical equivalent of Larmor precession) The above
Two-state_quantum_system
American theoretical physicist (1911–2008)
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
John_Archibald_Wheeler
Branch of astronomy
sufficiently massive, general relativity must be included to predict apsidal precession. The problem becomes more complicated when another body is added, creating
Celestial_mechanics
Celestial coordinate system used to describe Solar System objects
the March equinox, is not quite fixed. A slow motion of Earth's axis, precession, causes a slow, continuous turning of the coordinate system westward about
Ecliptic_coordinate_system
Astronomical equivalent of longitude
completing one cycle in about 26,000 years. This movement, known as precession, causes the coordinates of stationary celestial objects to change continuously
Right_ascension
French mathematician, astronomer, and geophysicist (1713–1765)
problem, being the first to obtain a satisfactory result for the apsidal precession of the Moon's orbit. In mathematics he is also credited with Clairaut's
Alexis_Clairaut
Line of northernmost latitude at which the Sun can be directly overhead
(Latin: Crab) at the June solstice (90° ecliptic longitude). Due to the precession of the equinoxes, this is no longer the case; today the Sun is in the
Tropic_of_Cancer
Measurement of blood volume
normalized to age, gender and body surface area from steady-state free precession cardiovascular magnetic resonance" (PDF). European Heart Journal. 27 (23):
End-diastolic_volume
German mathematician (1885–1955)
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Hermann_Weyl
Mathematical theory of the geometry of space and time
Mercury. The perihelion of Mercury's orbit exhibited an excess rate of precession over that which could be explained by the tugs of the other planets. The
Curved_spacetime
Characteristic of a spinning body in space
the Sun. Minor variation in the direction of the axis, known as axial precession, takes place over the course of 26,000 years. As a result, over the next
Axial_parallelism
Condition in which spacetime itself breaks down
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Gravitational_singularity
Indoor Sports Arena in Spain
Velódromo de Anoeta (formally and in Basque language Anoetako Belodromoa) is an indoor arena located at the Anoeta Sports Complex in San Sebastián, Spain
Velódromo_de_Anoeta
Set of spacetime events, light-connected to a given event
equivalence Relativity of simultaneity Relativistic Doppler effect Thomas precession Relativistic disk Bell's spaceship paradox Ehrenfest paradox Spacetime
Light_cone
Mathematical model combining space and time
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Spacetime
French mathematician, physicist and engineer (1854–1912)
equivalence Relativity of simultaneity Relativistic Doppler effect Thomas precession Relativistic disk Bell's spaceship paradox Ehrenfest paradox Spacetime
Henri_Poincaré
American–Irish neuroscientist
they show a specific kind of temporal coding in the form of theta phase precession. He shared the Nobel Prize in Physiology or Medicine in 2014, together
John_O'Keefe_(neuroscientist)
Device used in physical therapy
the formula for the precession of a gyroscope: the applied torque is equal to the cross product of the angular velocity of precession and the angular momentum
Gyroscopic_exercise_tool
Equations describing classical electromagnetism
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Maxwell's_equations
Spectroscopic technique based on change of nuclear spin state
voltage induced in a detection coil by precession of the nuclear spins around B0. After an RF pulse, precession usually occurs with the nuclei's Larmor
Nuclear_magnetic_resonance
British physicist and applied mathematician (1903–1992)
relativistic effects on the spin-orbit interaction in a hydrogenic atom (Thomas precession), creating an approximate theory of N {\displaystyle N} -body quantum
Llewellyn_Thomas
Study of the effects of forces on undeformable bodies
friction against precession cause another precession that goes to cause the fall. By convention, these three vectors – torque, spin, and precession – are all
Rigid_body_dynamics
Falsifiable explanation of natural phenomena
For example, it has been known since 1859 that the observed perihelion precession of Mercury violates Newtonian mechanics, but the theory remained the best
Scientific_theory
Length of time after which an eclipse repeats
naturally due to synchronization between lunar phase, nodal precession, and apsidal precession, it can be used to predict eclipses of the Sun and Moon. One
Saros_(astronomy)
Branch of differential geometry
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Riemannian_geometry
Plane on which most of a disk-shaped galaxy's mass lies
epoch;[citation needed] while in the currently-used J2000 epoch, after precession is taken into account, its position is RA 12h 51m 26.282s, Dec 27° 07′ 42
Galactic_plane
Diagram of different points in spacetime
contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Ladder paradox Twin paradox Terrell rotation Spacetime Light cone World
Penrose_diagram
Eschatological beliefs about the year
astrological interpretations associated with the phenomenon of axial precession. Chief among these ideas is the astrological concept of a "galactic alignment"
2012_phenomenon
PRECESSION
PRECESSION
Girl/Female
Tamil
Nirayana | நீராயநா
Fixed zodiac without precession
Nirayana | நீராயநா
Girl/Female
Hindu
Fixed zodiac without precession
PRECESSION
PRECESSION
Girl/Female
Hindu, Indian
Fame; Reputation; Popularity; Famous
Boy/Male
Tamil
Girl/Female
Hindu, Indian
A Light that Shines Very Bright
Boy/Male
Hindu
Lord of everything
Girl/Female
Bengali, Gujarati, Hindu, Indian, Kannada, Malayalam, Tamil, Telugu
Queen of the Universe
Boy/Male
Indian
Unit of army
Girl/Female
Hindu, Indian, Traditional
An Atom
Girl/Female
Muslim/Islamic
Light
Girl/Female
Muslim/Islamic
Unique precious gem
Female
Hebrew
(מַעֲכָה) Hebrew unisex name MAAKAH means "to press, to squeeze," i.e. "oppression." In the bible this is the name of many characters, including one of King David's wives, and a son of Nahor.
PRECESSION
PRECESSION
PRECESSION
PRECESSION
PRECESSION
a.
Of or pertaining to pression; as, the precessional movement of the equinoxes.
n.
The act of going before, or forward.