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motion comparison table
Subject has parameter is a kind of has propagation direction has synonym has definition
advance of the perihelion motion  The slow rotation of the major axis of a planet's orbit in the same direction as the revolution of the planet itself, due to gravitational interactions with other planets and/or other effects (such as those due to general relativity).
axis motion motion  the motion of the axis of a system
direct motion motion  For orbital motion in the solar system, motion that is counterclockwise in the orbit as seen from the north pole of the ecliptic; for an object observed on the celestial sphere, motion that is from west to east, resulting from the relative motion of the object and the Earth.
diurnal motion motion  The apparent daily motion of celestial bodies across the sky from east to west, caused by the Earth's rotation.
harmonic motion motion periodic motionA motion that repeats itself in equal intervals of time. An oscillating particle in harmonic motion is a harmonic oscillator.
mass motion motion  A non-uniform matter flow
orbitorbital elementmotion  The path in space followed by a celestial body.
prograde motion motion  Motion in the same direction as the prevailing direction of motion.
proper motion motion  The projection onto the celestial sphere of the space motion of a star relative to the solar system; thus the transverse component of the space motion of a star with respect to the solar system. Proper motion is usually tabulated in star catalogs as changes in right ascension and declination per year or century.
recession motion  Motion (increasing distance) away.
regression of the nodes motion  The slow (19°.35 per year, 360° in 18.6 years), westward motion of the nodes of the Moon's orbit due to perturbations of the Earth and Sun.
retrograde motion motion  Apparent motion of a planet in a direction opposite to its normal progress across the sky produced by the orbital motion of the earth.
rotation motion  Of a single body in space: spinning on an axis. Of a planetary system, rotation is generally planar in relation to the parent star.
wave harmonic motion periodic motionPropagation of energy by means of coherent vibration.

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