radial motion
noun Astronomy.
the component of the motion of a star away from or toward the earth along its line of sight, expressed in miles or kilometers per second and determined by the shift in the wavelength of light emitted by the star.
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Nearby words
- radial extensor muscle of wrist,
- radial flexor muscle of wrist,
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Compare redshift, tangential motion.
Also called radial velocity.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
radial velocity
noun
the component of the velocity of an object, esp a celestial body, directed along a line from the observer to the object
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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