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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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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

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

But the results of spectroscopic measurements of radial velocity are independent of the distance of the star.

From Side-Lights on Astronomy and Kindred Fields of Popular Science by Newcomb, Simon

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