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radial velocity

British

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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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These variations can imitate the subtle radial velocity signals astronomers look for, sometimes making it difficult to determine whether a planet is truly present.

From Science Daily • Nov. 23, 2025

One of the four sub-Earth exoplanets discovered is the least massive world ever found using the radial velocity technique.

From Space Scoop • Apr. 23, 2025

The four exoplanets, known as the sub-Earth exoplanets, were discovered using the radial velocity technique by the MAROON-X instrument.

From Space Scoop • Apr. 23, 2025

To obtain such exact information on the planets in this solar system, the team built computer models using hundreds of radial velocity measurements layered over TTV data.

From Science Daily • Jan. 26, 2024

A large radial velocity seems therefore to be a galactic phenomenon and to be correlated to a great distance from us.

From Lectures on Stellar Statistics by Charlier, Carl Vilhelm Ludvig

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023