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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

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

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

For the most recent study, the researchers joined TTV data with a radial velocity analysis of the star.

From Science Daily • Jan. 26, 2024

Not only the grosser facts concerning radial velocity, but variations in it so small as a mile, or less, per second, have been recorded and interpreted in terms of deep meaning.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various

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