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radial motion

[ rey-dee-uhl moh-shuhn ]
/ 藞re瑟 di 蓹l 藞mo蕣 蕛蓹n /
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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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Also called ra路di路al ve路loc路i路ty [rey-dee-uhl vuh-los-i-tee] /藞re瑟 di 蓹l v蓹藞l蓲s 瑟 ti/ .

Origin of radial motion

First recorded in 1880鈥85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2022

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